We have MSP360 backup running on a Windows Server 2019. The service is set to backup on 20 minute intervals with another full backup at 11pm at night. Each backup task errors out with a VSS error. The latest error we got was:

Event id: 12289 - Volume Shadow Copy Service error: Unexpected error DeviceIoControl(\\?\Volume{dc5af23e-f187-42b0-851c-b2faaf5c0548} - 00000000000002DC,0x0053c008,00000259285BD1B0,0,00000259285C3210,4096,[0]). hr = 0x80070299, The requested operation could not be completed due to a file system limitation

This is the only windows server that we have this issue on. We have days that it works as intended but then it stops working until we reboot the system, which we can't afford to do every day.

We have contacted Dell, and Microsoft, both of which suggested that we refer to the application support to troubleshoot. We have tried through tickets and were able to fix the issue temporarily but it always returns. We also have had the same issue when backing up through Synology Active Backup. That was without any other backup service running and we still got VSS errors.

Any suggestions to solve?

Thanks.