Symptoms
If you have M-Files server 25.1 (January 2025 release) and have one or more of the following symptoms, try the solution listed below.
- External repository (such as NFC - Network Folder Connector) or external database (such as OleDB driver) disappear.
- You may also see errors like “The requested security protocol is not supported.”, especially if you restart the vault when the application tries to start.
- For M-Files Cloud vaults, this may apply to Ground Link proxy servers.
- Most seen if the OS is Windows Server 2019, perhaps also for Windows Server 2016.
Examples of where you may see this issue:
Solution
Install .NET Framework 4.8 Runtime (not only 4.7.2) on the server and restart the OS.
This is a direct download link for Windows Server 2019: https://learn.microsoft.com/en-us/dotnet/framework/install/on-server-2019
The OS otherwise may have some issues with enabling TLS version 1.3 for .NET code, and .NET 4.8 fixes that. This arises because M-Files explicitly disallowed old protocol versions in 25.1 and so now TLS 1.3 is attempted.
