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Mattermost Knowledge Base
Self-Managed
Self-Managed
Troubleshooting for on-prem deployments.
General
Why users are seeing 'limit exceeded' errors?
Guest Users Cannot Mention User Groups in Mattermost
Fixing "Server Not Found" Error in Mattermost
Getting Help with Your Mattermost User Account
System console still displays old license after uploading a new one
Mattermost GPG Key Expired
See all 17 articles
CLI & MMCTL
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
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
Mattermost Stops Working After Stopping MySQL Post-Migration to PostgreSQL
Does Mattermost Support MariaDB?
Troubleshooting Mattermost Kubernetes Deployment Errors in Air-Gapped Environments
Configuring a Socket-Based Database Connection for Mattermost (Self-Managed)
Resolving Insufficient Permission Error When Deleting an AWS OpenSearch Index
Resolving Image Display Issues in Mattermost Due to Image Proxy Setting
See all 21 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 Configuration Troubleshooting in Mattermost (Bind & Sync)
Using ldapsearch
LDAP Deactivates Users Unexpectedly
LDAP or SAML Error: "A user with this username already exists"
Error After Upgrade: SAML Missing the NameID Element
Plugins
Handling CSRF Header Check Issues
Playbooks: Can't start new runs
Plugins missing from the System Console (Self-Hosted)
Installing a Plugin Failed with 'Received Invalid Response from the Server'
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Can't login, AD/LDAP setup, Server troubleshooting