Beginning to work with more GPO. Practiicng on a test machine(s) but down the road I would feel better if I could backup the GPO on the production machines before applying changes. Like backing up your registry before messing wiht it it would nice to have a Go Back to Previous GPO option. I see the Backup option there but are there and standard best practices for doing this I need to be aware of? right off the bat it seemed to back up well but with sever warnigns like:
[Warning] The security principal [S-1-5-21-527237240-602162358-839522115-2617] referenced in extension [Security] cannot be resolved, but the task will continue. In the future, you can use a migration table to map or remove this security principal.
Details: No mapping between account names and security IDs was done.
[Warning] The domain of the security principal [xxxx\Administrator] can not be contacted to determine the type of this security principal which is referenced in extension [Security], but the task will continue. In the future, you can use a migration table
to map or remove this security principal.
Details: The system cannot find the file specified.