@florent it was 2 windows vm's, both with 100gb but not even 50% filled. Edit: All Linux VM's worked tho.

@florent We are a university in Türkiye. The S3 service is provided to us by the National Academic Network and Information Center (ULAKBİM), an official institution of Türkiye.

@tsukraw There's no need to uninstall the old version, the upgrade is enough. The feature to disable time sync is also just a convenience shortcut for setting the TimeSyncMode value in HKLM\SYSTEM\CurrentControlSet\Services\xenagent to a DWORD of 0. You can set it manually or through Group Policy if you wish. (In fact, GPO might be a better solution on domain environments)