Full name absent after enabling Gitlab SSO

Troubleshooting
1

Hi, we are running Matermost server v. 6.0.0 and today we turned on Gitlab SSO. It is working, mostly - users can authenticate via gitlab. But after logon user’s first name and last name disappears from profile and is unavailable to edit, so everybody is seen as “Username”, not as “Firstname Lastname”. I tried writing out those fields in Mattermost DB directly, but they are changing to empty after each logon. So, it looks like we are missing some info in gitlab, but I can’t figure out what exactly.
Could you please explain which data from gitlab (DB fields may be?) provides first name and last name for MM?

Summary
User’s first name and last name disappears from profile after switching to Gitlab SSO

Steps to reproduce

  1. Mattermost server 6.0.0, enabling gitlab SSO
  2. Gitlab 14.7
  3. Relogin with gitlab SSO - getting users first name and last name empty

Expected behavior
Full name filled from “name” field in gitlab

Observed behavior

image
image798×712 34.1 KB

1 Like
2

Hi,
Yesturday I updated Mattermost server to the last version - 6.3.1. And the prodlem is still here :frowning: How mattermost gets user’s full name from gitlab?

3

Hello.
Can somebody answer me please?

4

Would you be open to sharing your config.json settings (with confidential details redacted)?

6
Summary 
    "ServiceSettings": {
        "SiteURL": "https://mattermost.orgname.com",
        "WebsocketURL": "",
        "LicenseFileLocation": "",
        "ListenAddress": ":8065",
        "ConnectionSecurity": "",
        "TLSCertFile": "",
        "TLSKeyFile": "",
        "TLSMinVer": "1.2",
        "TLSStrictTransport": false,
        "TLSStrictTransportMaxAge": 63072000,
        "TLSOverwriteCiphers": [],
        "UseLetsEncrypt": false,
        "LetsEncryptCertificateCacheFile": "./config/letsencrypt.cache",
        "Forward80To443": false,
        "TrustedProxyIPHeader": [
            "X-Forwarded-For",
            "X-Real-IP"
        ],
        "ReadTimeout": 300,
        "WriteTimeout": 300,
        "IdleTimeout": 60,
        "MaximumLoginAttempts": 5,
        "GoroutineHealthThreshold": -1,
        "EnableOAuthServiceProvider": true,
        "EnableIncomingWebhooks": true,
        "EnableOutgoingWebhooks": true,
        "EnableCommands": true,
        "EnablePostUsernameOverride": true,
        "EnablePostIconOverride": true,
        "GoogleDeveloperKey": "",
        "EnableLinkPreviews": true,
        "EnablePermalinkPreviews": true,
        "RestrictLinkPreviews": "",
        "EnableTesting": false,
        "EnableDeveloper": false,
        "DeveloperFlags": "",
        "EnableOpenTracing": false,
        "EnableSecurityFixAlert": true,
        "EnableInsecureOutgoingConnections": false,
        "AllowedUntrustedInternalConnections": "gitlab.orgname.com",
        "EnableMultifactorAuthentication": false,
        "EnforceMultifactorAuthentication": false,
        "EnableUserAccessTokens": true,
        "AllowCorsFrom": "",
        "CorsExposedHeaders": "",
        "CorsAllowCredentials": false,
        "CorsDebug": false,
        "AllowCookiesForSubdomains": false,
        "ExtendSessionLengthWithActivity": true,
        "SessionLengthWebInDays": 999,
        "SessionLengthMobileInDays": 999,
        "SessionLengthSSOInDays": 999,
        "SessionCacheInMinutes": 10,
        "SessionIdleTimeoutInMinutes": 43200,
        "WebsocketSecurePort": 443,
        "WebsocketPort": 80,
        "WebserverMode": "gzip",
        "EnableGifPicker": true,
        "GfycatAPIKey": "somekeyhere",
        "GfycatAPISecret": "sometokenhere",
        "EnableCustomEmoji": true,
        "EnableEmojiPicker": true,
        "PostEditTimeLimit": -1,
        "TimeBetweenUserTypingUpdatesMilliseconds": 5000,
        "EnablePostSearch": true,
        "EnableFileSearch": true,
        "MinimumHashtagLength": 3,
        "EnableUserTypingMessages": true,
        "EnableChannelViewedMessages": true,
        "EnableUserStatuses": true,
        "ExperimentalEnableAuthenticationTransfer": true,
        "ClusterLogTimeoutMilliseconds": 2000,
        "EnablePreviewFeatures": true,
        "EnableTutorial": true,
        "EnableOnboardingFlow": true,
        "ExperimentalEnableDefaultChannelLeaveJoinMessages": true,
        "ExperimentalGroupUnreadChannels": "disabled",
        "EnableAPITeamDeletion": false,
        "EnableAPIUserDeletion": false,
        "ExperimentalEnableHardenedMode": false,
        "ExperimentalStrictCSRFEnforcement": false,
        "EnableEmailInvitations": false,
        "DisableBotsWhenOwnerIsDeactivated": true,
        "EnableBotAccountCreation": true,
        "EnableSVGs": true,
        "EnableLatex": false,
        "EnableInlineLatex": true,
        "EnableAPIChannelDeletion": false,
        "EnableLocalMode": false,
        "LocalModeSocketLocation": "/var/tmp/mattermost_local.socket",
        "EnableAWSMetering": false,
        "SplitKey": "",
        "FeatureFlagSyncIntervalSeconds": 30,
        "DebugSplit": false,
        "ThreadAutoFollow": true,
        "CollapsedThreads": "disabled",
        "ManagedResourcePaths": ""
    },
    "TeamSettings": {
        "SiteName": "Mattermost",
        "MaxUsersPerTeam": 250,
        "EnableUserCreation": true,
        "EnableOpenServer": false,
        "EnableUserDeactivation": false,
        "RestrictCreationToDomains": "orgname.com",
        "EnableCustomUserStatuses": true,
        "EnableCustomBrand": true,
        "CustomBrandText": "",
        "CustomDescriptionText": "",
        "RestrictDirectMessage": "any",
        "UserStatusAwayTimeout": 300,
        "MaxChannelsPerTeam": 2000,
        "MaxNotificationsPerChannel": 1000,
        "EnableConfirmNotificationsToChannel": true,
        "TeammateNameDisplay": "full_name",
        "ExperimentalViewArchivedChannels": true,
        "ExperimentalEnableAutomaticReplies": false,
        "LockTeammateNameDisplay": false,
        "ExperimentalPrimaryTeam": "",
        "ExperimentalDefaultChannels": []
    },
    "ClientRequirements": {
        "AndroidLatestVersion": "",
        "AndroidMinVersion": "",
        "IosLatestVersion": "",
        "IosMinVersion": ""
    },
    "SqlSettings": {
        "DriverName": "postgres",
        "DataSource": "postgres://dbuser:dbpassword@localhost:5433/mattermost?sslmode=disable\u0026connect_timeout=10",
        "DataSourceReplicas": [],
        "DataSourceSearchReplicas": [],
        "MaxIdleConns": 20,
        "ConnMaxLifetimeMilliseconds": 3600000,
        "ConnMaxIdleTimeMilliseconds": 300000,
        "MaxOpenConns": 300,
        "Trace": false,
        "AtRestEncryptKey": "somekeyhere",
        "QueryTimeout": 30,
        "DisableDatabaseSearch": false,
        "ReplicaLagSettings": []
    },
    "LogSettings": {
        "EnableConsole": false,
        "ConsoleLevel": "INFO",
        "ConsoleJson": true,
        "EnableColor": false,
        "EnableFile": true,
        "FileLevel": "INFO",
        "FileJson": true,
        "FileLocation": "",
        "EnableWebhookDebugging": true,
        "EnableDiagnostics": true,
        "EnableSentry": true,
        "AdvancedLoggingConfig": ""
    },
    "ExperimentalAuditSettings": {
        "FileEnabled": false,
        "FileName": "",
        "FileMaxSizeMB": 100,
        "FileMaxAgeDays": 0,
        "FileMaxBackups": 0,
        "FileCompress": false,
        "FileMaxQueueSize": 1000,
        "AdvancedLoggingConfig": ""
    },
    "NotificationLogSettings": {
        "EnableConsole": true,
        "ConsoleLevel": "INFO",
        "ConsoleJson": true,
        "EnableColor": false,
        "EnableFile": true,
        "FileLevel": "INFO",
        "FileJson": true,
        "FileLocation": "",
        "AdvancedLoggingConfig": ""
    },
    "PasswordSettings": {
        "MinimumLength": 8,
        "Lowercase": true,
        "Number": true,
        "Uppercase": true,
        "Symbol": false
    },
    "FileSettings": {
        "EnableFileAttachments": true,
        "EnableMobileUpload": true,
        "EnableMobileDownload": true,
        "MaxFileSize": 104857600,
        "MaxImageResolution": 33177600,
        "DriverName": "local",
        "Directory": "./data/",
        "EnablePublicLink": true,
        "ExtractContent": true,
        "ArchiveRecursion": false,
        "PublicLinkSalt": "q5etwa7bbgooytbw13kkd3xe3188zj8n",
        "InitialFont": "nunito-bold.ttf",
        "AmazonS3AccessKeyId": "",
        "AmazonS3SecretAccessKey": "",
        "AmazonS3Bucket": "",
        "AmazonS3PathPrefix": "",
        "AmazonS3Region": "",
        "AmazonS3Endpoint": "s3.amazonaws.com",
        "AmazonS3SSL": true,
        "AmazonS3SignV2": false,
        "AmazonS3SSE": false,
        "AmazonS3Trace": false
    },
    "EmailSettings": {
        "EnableSignUpWithEmail": true,
        "EnableSignInWithEmail": false,
        "EnableSignInWithUsername": false,
        "SendEmailNotifications": true,
        "UseChannelInEmailNotifications": false,
        "RequireEmailVerification": true,
        "FeedbackName": "Mattermost Notificator",
        "FeedbackEmail": "mattermost@orgname.com",
        "ReplyToAddress": "test@example.com",
        "FeedbackOrganization": "",
        "EnableSMTPAuth": true,
        "SMTPUsername": "groupware@orgname.com",
        "SMTPPassword": "UqpPl|Cll8U8",
        "SMTPServer": "smtp.gmail.com",
        "SMTPPort": "465",
        "SMTPServerTimeout": 10,
        "ConnectionSecurity": "TLS",
        "SendPushNotifications": true,
        "PushNotificationServer": "https://push-test.mattermost.com",
        "PushNotificationContents": "full",
        "PushNotificationBuffer": 1000,
        "EnableEmailBatching": false,
        "EmailBatchingBufferSize": 256,
        "EmailBatchingInterval": 30,
        "EnablePreviewModeBanner": true,
        "SkipServerCertificateVerification": false,
        "EmailNotificationContentsType": "full",
        "LoginButtonColor": "#0000",
        "LoginButtonBorderColor": "#2389D7",
        "LoginButtonTextColor": "#2389D7"
    },
    "RateLimitSettings": {
        "Enable": true,
        "PerSec": 5,
        "MaxBurst": 100,
        "MemoryStoreSize": 10000,
        "VaryByRemoteAddr": true,
        "VaryByUser": false,
        "VaryByHeader": ""
    },
    "PrivacySettings": {
        "ShowEmailAddress": true,
        "ShowFullName": true
    },
    "SupportSettings": {
        "TermsOfServiceLink": "https://mattermost.com/terms-of-service/",
        "PrivacyPolicyLink": "https://mattermost.com/privacy-policy/",
        "AboutLink": "https://about.mattermost.com/default-about/",
        "HelpLink": "https://about.mattermost.com/default-help/",
        "ReportAProblemLink": "https://about.mattermost.com/default-report-a-problem/",
        "SupportEmail": "",
        "CustomTermsOfServiceEnabled": false,
        "CustomTermsOfServiceReAcceptancePeriod": 365,
        "EnableAskCommunityLink": true
    },
    "AnnouncementSettings": {
        "EnableBanner": false,
        "BannerText": "",
        "BannerColor": "#f2a93b",
        "BannerTextColor": "#333333",
        "AllowBannerDismissal": true,
        "AdminNoticesEnabled": true,
        "UserNoticesEnabled": true,
        "NoticesURL": "https://notices.mattermost.com/",
        "NoticesFetchFrequency": 3600,
        "NoticesSkipCache": false
    },
    "ThemeSettings": {
        "EnableThemeSelection": true,
        "DefaultTheme": "default",
        "AllowCustomThemes": true,
        "AllowedThemes": []
    },
    "GitLabSettings": {
        "Enable": true,
        "Secret": "sometokenhere",
        "Id": "4c723bca78cd149d2d93b1997eabc12096f26a31cb1221c493162d9066bb63bb",
        "Scope": "openid profile email",
        "AuthEndpoint": "https://gitlab.orgname.com/oauth/authorize",
        "TokenEndpoint": "https://gitlab.orgname.com/oauth/token",
        "UserAPIEndpoint": "https://gitlab.orgname.com/api/v4/user",
        "DiscoveryEndpoint": "https://gitlab.orgname.com/.well-known/openid-configuration",
        "ButtonText": "",
        "ButtonColor": ""
    },
    "GoogleSettings": {
        "Enable": false,
        "Secret": "",
        "Id": "",
        "Scope": "profile email",
        "AuthEndpoint": "https://accounts.google.com/o/oauth2/v2/auth",
        "TokenEndpoint": "https://www.googleapis.com/oauth2/v4/token",
        "UserAPIEndpoint": "https://people.googleapis.com/v1/people/me?personFields=names,emailAddresses,nicknames,metadata",
        "DiscoveryEndpoint": "",
        "ButtonText": "",
        "ButtonColor": ""
    },
    "Office365Settings": {
        "Enable": false,
        "Secret": "",
        "Id": "",
        "Scope": "User.Read",
        "AuthEndpoint": "https://login.microsoftonline.com/common/oauth2/v2.0/authorize",
        "TokenEndpoint": "https://login.microsoftonline.com/common/oauth2/v2.0/token",
        "UserAPIEndpoint": "https://graph.microsoft.com/v1.0/me",
        "DiscoveryEndpoint": "",
        "DirectoryId": ""
    },
    "OpenIdSettings": {
        "Enable": false,
        "Secret": "",
        "Id": "",
        "Scope": "profile openid email",
        "AuthEndpoint": "",
        "TokenEndpoint": "",
        "UserAPIEndpoint": "",
        "DiscoveryEndpoint": "",
        "ButtonText": "",
        "ButtonColor": "#145DBF"
    },
    "LdapSettings": {
        "Enable": false,
        "EnableSync": false,
        "LdapServer": "",
        "LdapPort": 389,
        "ConnectionSecurity": "",
        "BaseDN": "",
        "BindUsername": "",
        "BindPassword": "",
        "UserFilter": "",
        "GroupFilter": "",
        "GuestFilter": "",
        "EnableAdminFilter": false,
        "AdminFilter": "",
        "GroupDisplayNameAttribute": "",
        "GroupIdAttribute": "",
        "FirstNameAttribute": "",
        "LastNameAttribute": "",
        "EmailAttribute": "",
        "UsernameAttribute": "",
        "NicknameAttribute": "",
        "IdAttribute": "",
        "PositionAttribute": "",
        "LoginIdAttribute": "",
        "PictureAttribute": "",
        "SyncIntervalMinutes": 60,
        "SkipCertificateVerification": false,
        "PublicCertificateFile": "",
        "PrivateKeyFile": "",
        "QueryTimeout": 60,
        "MaxPageSize": 0,
        "LoginFieldName": "",
        "LoginButtonColor": "#0000",
        "LoginButtonBorderColor": "#2389D7",
        "LoginButtonTextColor": "#2389D7",
        "Trace": false
    },
    "ComplianceSettings": {
        "Enable": false,
        "Directory": "./data/",
        "EnableDaily": false,
        "BatchSize": 30000
    },
    "LocalizationSettings": {
        "DefaultServerLocale": "en",
        "DefaultClientLocale": "ru",
        "AvailableLocales": ""
    },
    "SamlSettings": {
        "Enable": false,
        "EnableSyncWithLdap": false,
        "EnableSyncWithLdapIncludeAuth": false,
        "IgnoreGuestsLdapSync": false,
        "Verify": true,
        "Encrypt": true,
        "SignRequest": false,
        "IdpURL": "",
        "IdpDescriptorURL": "",
        "IdpMetadataURL": "",
        "ServiceProviderIdentifier": "",
        "AssertionConsumerServiceURL": "",
        "SignatureAlgorithm": "RSAwithSHA1",
        "CanonicalAlgorithm": "Canonical1.0",
        "ScopingIDPProviderId": "",
        "ScopingIDPName": "",
        "IdpCertificateFile": "",
        "PublicCertificateFile": "",
        "PrivateKeyFile": "",
        "IdAttribute": "",
        "GuestAttribute": "",
        "EnableAdminAttribute": false,
        "AdminAttribute": "",
        "FirstNameAttribute": "",
        "LastNameAttribute": "",
        "EmailAttribute": "",
        "UsernameAttribute": "",
        "NicknameAttribute": "",
        "LocaleAttribute": "",
        "PositionAttribute": "",
        "LoginButtonText": "SAML",
        "LoginButtonColor": "#34a28b",
        "LoginButtonBorderColor": "#2389D7",
        "LoginButtonTextColor": "#ffffff"
    },
    "NativeAppSettings": {
        "AppCustomURLSchemes": [
            "mmauth://",
            "mmauthbeta://"
        ],
        "AppDownloadLink": "https://mattermost.com/download/#mattermostApps",
        "AndroidAppDownloadLink": "https://about.mattermost.com/mattermost-android-app/",
        "IosAppDownloadLink": "https://about.mattermost.com/mattermost-ios-app/"
    },
    "ClusterSettings": {
        "Enable": false,
        "ClusterName": "",
        "OverrideHostname": "",
        "NetworkInterface": "",
        "BindAddress": "",
        "AdvertiseAddress": "",
        "UseIPAddress": true,
        "EnableGossipCompression": true,
        "EnableExperimentalGossipEncryption": false,
        "ReadOnlyConfig": true,
        "GossipPort": 8074,
        "StreamingPort": 8075,
        "MaxIdleConns": 100,
        "MaxIdleConnsPerHost": 128,
        "IdleConnTimeoutMilliseconds": 90000
    },
    "MetricsSettings": {
        "Enable": false,
        "BlockProfileRate": 0,
        "ListenAddress": ":8067"
    },
    "ExperimentalSettings": {
        "ClientSideCertEnable": false,
        "ClientSideCertCheck": "secondary",
        "EnableClickToReply": false,
        "LinkMetadataTimeoutMilliseconds": 5000,
        "RestrictSystemAdmin": false,
        "UseNewSAMLLibrary": false,
        "CloudUserLimit": 0,
        "CloudBilling": false,
        "EnableSharedChannels": false,
        "EnableRemoteClusterService": false
    },
    "AnalyticsSettings": {
        "MaxUsersForStatistics": 2500
    },
    "ElasticsearchSettings": {
        "ConnectionURL": "http://localhost:9200",
        "Username": "elastic",
        "Password": "changeme",
        "EnableIndexing": false,
        "EnableSearching": false,
        "EnableAutocomplete": false,
        "Sniff": true,
        "PostIndexReplicas": 1,
        "PostIndexShards": 1,
        "ChannelIndexReplicas": 1,
        "ChannelIndexShards": 1,
        "UserIndexReplicas": 1,
        "UserIndexShards": 1,
        "AggregatePostsAfterDays": 365,
        "PostsAggregatorJobStartTime": "03:00",
        "IndexPrefix": "",
        "LiveIndexingBatchSize": 1,
        "BulkIndexingTimeWindowSeconds": 3600,
        "RequestTimeoutSeconds": 30,
        "SkipTLSVerification": false,
        "Trace": ""
    },
    "BleveSettings": {
        "IndexDir": "",
        "EnableIndexing": false,
        "EnableSearching": false,
        "EnableAutocomplete": false,
        "BulkIndexingTimeWindowSeconds": 3600
    },
    "DataRetentionSettings": {
        "EnableMessageDeletion": false,
        "EnableFileDeletion": false,
        "MessageRetentionDays": 365,
        "FileRetentionDays": 365,
        "DeletionJobStartTime": "02:00",
        "BatchSize": 3000
    },
    "MessageExportSettings": {
        "EnableExport": false,
        "ExportFormat": "actiance",
        "DailyRunTime": "01:00",
        "ExportFromTimestamp": 0,
        "BatchSize": 10000,
        "DownloadExportResults": false,
        "GlobalRelaySettings": {
            "CustomerType": "A9",
            "SMTPUsername": "",
            "SMTPPassword": "",
            "EmailAddress": "",
            "SMTPServerTimeout": 1800
        }
    },
    "JobSettings": {
        "RunJobs": true,
        "RunScheduler": true,
        "CleanupJobsThresholdDays": -1
    },
    "PluginSettings": {
        "Enable": true,
        "EnableUploads": true,
        "AllowInsecureDownloadURL": false,
        "EnableHealthCheck": true,
        "Directory": "/opt/mattermost/plugins",
        "ClientDirectory": "/opt/mattermost/client/plugins",
        "Plugins": {
            "com.github.moussetc.mattermost.plugin.giphy": {
                "apikey": "somekeyhere",
                "language (giphy\u0026tenor only)": "ru",
                "provider": "giphy",
                "rating": "r",
                "rendition": "fixed_height_small",
                "renditiongfycat": "gif100px"
            },
            "com.mattermost.nps": {
                "enablesurvey": false
            },
            "jira": {
                "enablejiraui": false,
                "groupsallowedtoeditjirasubscriptions": "",
                "jiraadminadditionalhelptext": "",
                "rolesallowedtoeditjirasubscriptions": "system_admin",
                "secret": null,
                "statssecret": null
            },
            "jitsi": {
                "jitsiappid": null,
                "jitsiappsecret": null,
                "jitsicompatibilitymode": false,
                "jitsiembedded": false,
                "jitsijwt": false,
                "jitsilinkvalidtime": 120,
                "jitsinamingscheme": "mattermost",
                "jitsiurl": "https://jitsi.orgname.com"
            },
            "mattermost-webrtc-video": {
                "signalhuburl": "https://baatcheet.herokuapp.com",
                "stunserver": "stun:stun4.l.google.com:19302",
                "turnserver": "turn:numb.viagenie.ca:3478",
                "turnservercredential": "muazkh",
                "turnserverusername": "webrtc@live.com"
            },
            "playbooks": {
                "BotUserID": "btz4mmqthbbczxhwteteho7dbc"
            }
        },
        "PluginStates": {
            "bigbluebutton": {
                "Enable": false
            },
            "com.github.moussetc.mattermost.plugin.giphy": {
                "Enable": true
            },
            "com.github.scottleedavis.mattermost-plugin-remind": {
                "Enable": true
            },
            "com.mattermost.draw-plugin": {
                "Enable": false
            },
            "com.mattermost.nps": {
                "Enable": true
            },
            "com.mattermost.plugin-channel-export": {
                "Enable": true
            },
            "com.mattermost.plugin-incident-management": {
                "Enable": false
            },
            "com.mattermost.voice": {
                "Enable": true
            },
            "com.mattermost.welcomebot": {
                "Enable": false
            },
            "focalboard": {
                "Enable": true
            },
            "jira": {
                "Enable": false
            },
            "jitsi": {
                "Enable": true
            },
            "mattermost-file-list": {
                "Enable": false
            },
            "mattermost-webrtc-video": {
                "Enable": false
            },
            "playbooks": {
                "Enable": true
            }
        },
        "EnableMarketplace": true,
        "EnableRemoteMarketplace": true,
        "AutomaticPrepackagedPlugins": true,
        "RequirePluginSignature": false,
        "MarketplaceURL": "https://api.integrations.mattermost.com",
        "SignaturePublicKeyFiles": [],
        "ChimeraOAuthProxyURL": ""
    },
    "DisplaySettings": {
        "CustomURLSchemes": [],
        "ExperimentalTimezone": false
    },
    "GuestAccountsSettings": {
        "Enable": false,
        "AllowEmailAccounts": true,
        "EnforceMultifactorAuthentication": false,
        "RestrictCreationToDomains": ""
    },
    "ImageProxySettings": {
        "Enable": false,
        "ImageProxyType": "local",
        "RemoteImageProxyURL": "",
        "RemoteImageProxyOptions": ""
    },
    "CloudSettings": {
        "CWSURL": "https://customers.mattermost.com",
        "CWSAPIURL": "https://portal.internal.prod.cloud.mattermost.com"
    },
    "ImportSettings": {
        "Directory": "./import",
        "RetentionDays": 30
    },
    "ExportSettings": {
        "Directory": "./export",
        "RetentionDays": 30
    }
}```
9

@sven.huester or @Colton Would you have thoughts on this issue?

10

@DFC It looks like this is due to a change on GitLab’s openID response. We expect FirstName / LastName to be included but Gitlab returns just name which contains the full name of your user. I’ve opened a bug ticket that you can follow - [MM-41758] - Mattermost