Description of the issue:
- You have created an encrypted group backup plan (for All Site Collections)
- You are trying to browse/ recover the encrypted backups
- A warning is shown "The backup you are browsing is encrypted. The search in encrypted backups is not supported."
Cause
Issue in the product.
Acronis Development Team is working on a fix.
This article will be updated once a fix version is released.
Workaround
Don't use encryption for C2C Sharepoint Online backups.
Encryption cannot be disabled/ enabled for an already existing backup plan, this will require deleting the existing backup and backup plan and creating a new identical plan but without encryption, which will create its new backup chain.