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Symptom
Unable to upgrade the exchange server to CU14. [ERROR] An error occurred with error code '3221684229' and message 'Access is denied.'
Assessment
- Download procmon tool
- Capture the procmon during the setup failure
- Export the capture as CSV
- Filter the CSV result field with access denied
Cause
Check if below events regarding access denied are logged in proc Mon capture
*"19:29.1 ExSetupUI.exe 30216 CreateFile \Device\HarddiskVolumeShadowCopy9\System Volume Information ACCESS DENIED Desired Access: Read Data/List Directory, Synchronize, Disposition: Open, Options: Directory, Synchronous IO Non-Alert, Attributes: n/a, ShareMode: Read, Write, Delete, AllocationSize: n/a"
*
Resolution
Identify if the above volume listed is shadowcopyvolume or disk volume
If its shadowcopy volume, delete the shadow using the command
DISKSHADOW>delete shadows all
If its Disk volume, identify the volume using below command
DISKPART> list volume Provide the account used for installation full control over the system volume folder on volume listed