Generation Without Valid Restore Points (code 2527)

Situation

A backup plan finishes with the following warning: Generation without valid restore points. The current generation does not contain any valid restore points: retention policy cannot be applied. Previous generations were not purged

Cause

The occurrence of this warning means that there are no successful restore points in the current generation. Under these circumstances, purging for previous generations is disabled despite the retention policy settings. Previous generations are not purged to keep valid data for restore.

Solution

Investigate why the backup plan cannot finish successfully and eliminate the causes. To do this, proceed as follows:

1. Switch to the Backup Storage tab.
2. Find the required storage account, then find the plan that produced this warning.

3. Expand it and find the current generation.
4. Go through the restore points and view the errors/warnings that made them unsuccessful. To do this, select the required restore point, then in the bottom right frame, switch to the Message tab.

5. Figure out the errors/warnings that caused the restore point to be unsuccessful, then follow the instructions to get rid of these errors/warnings. Sometimes they are given directly in the Solution section, sometimes you need to read the Knowledge Base articles that guide you through the issue and its resolution.
6. Once you have taken the required actions, run the backup plan again and make sure the backup is successful.