Self-Managed

General

• Messages Incorrectly Sent to Previous Channel During Rapid Channel Switching
• Single video attachments not visible when image previews are collapsed (v11.10.0)
• Elasticsearch Startup Failure Causes Memory Leak and Repeated OOM Kills (v11.7+)
• LDAP/SAML Nickname Attribute Exceeding 64 Characters Causes "Invalid Nickname" Login Error
• Server Fails to Start After Upgrade Due to Read Replica Lag During App Migrations
• Restricting Team Email Invitations to Team Administrators Only
• See all 41 articles

CLI & MMCTL

• Notification logs stop being produced after upgrading to Mattermost v11
• Plugin fails to activate with "An account with that email already exists" for its bot account
• mmctl Fails With a Credentials Error, and Deactivated AD/LDAP Users Keep Reactivating
• Troubleshooting: Migrating a User from GitLab OAuth to SAML in Mattermost
• Troubleshooting Guide: Delays in Managing Personal Access Tokens in Mattermost
• Delete old archived channels
• See all 7 articles

Licensing

• Eligibility for Mattermost Staging/Testing Licenses
• How to Resolve the "Invalid Signature" Error in Mattermost when requesting a Trial License
• Updating a Mattermost Enterprise License

Infrastructure and Monitoring

• Bulk indexing fails with HTTP 403 after migrating from Elasticsearch to OpenSearch
• Investigating a Suspected Plugin Memory Leak and Capping Server Memory Growth
• ARM64 support for Mattermost Server
• Elasticsearch Startup Failure Causes Memory Leak and Repeated OOM Kills (v11.7+)
• Data Retention Job Fails with Permission Denied on File Deletion
• Enabling Korean (CJK) Search with OpenSearch/Elasticsearch in Multi-Pod Deployments
• See all 42 articles

SAML Integration

• SAML SSO with Entra ID: Resolving Signature Verification Errors
• Solving "Duplicate Username" SAML Login Warning in Mattermost

AD and LDAP Integration

• LDAP-Managed Users Cannot Be Deactivated from System Console or API (v10.2.0+)
• Hiding the "Switch to Email and Password" Sign-In Option for AD/LDAP-Only Deployments
• AD/LDAP Group Sync Does Not Promote Members to Team Admin
• LDAP User Remains Deactivated After Returning - AuthData Mismatch on IdAttribute Change
• Understanding LDAP `objectGUID` Encoding in Mattermost
• LDAP Configuration Troubleshooting in Mattermost (Bind & Sync)
• See all 11 articles

Plugins

• Investigating a Suspected Plugin Memory Leak and Capping Server Memory Growth
• Boards Attachments Invisible After MySQL to PostgreSQL Migration
• Plugin Configurations Wiped in HA Environments When Plugin Subsystem Is Disabled and Re-enabled
• Jira Plugin Sends Duplicate Assignment Notifications in High Availability Environments
• Google Drive Plugin Notifications Not Arriving After Enabling Create/Upload Features
• AI Services List Is Empty After Upgrading from Mattermost Agents v1 to v2
• See all 15 articles