Sometimes you find yourself in a position where either get a pop up error message or in the logfiles you have errors that the access is denied.
Typical scenarios could be:
* You perform a backup and it fails with an error message 'Access Denied' (you see this usually in the logfiles)
* You create a new Vault Workgroup (replication) in Vault Server and get a SQL error -26
* You have problems with rebuilding the Search Index of your Vault and in the logfiles you find entries about Lucene error 227 and such entries:
Access to the path 'C:\ProgramData\Autodesk\VaultServer\Indexes\Vault\write.lock' is denied
And all other issues where you can think of that the root cause could be just a failed windows operation due to lack of permissions.
To troubleshoot the issue you could use Process Monitor (from Microsoft).
1. Download Process Monitor here
2. Run Process Monitor on the Vault Server
3. In Menu Filter go to Filter ...
4. Pick Result and use the condition "is". As value choose: ACCESS DENIED

5. Click add to enable the Filter and then the ok button
6. Press Ctrl + X to clear the current results inside process monitor
7. Reproduce your issue again (try to perform the backup, add the Workgroup, rebuild search indexes etc.)
Now you should see some operations which failed due to the Result "Access Denied" like this: