How to add an alternative UPN to Active Directory and change the UPN for all users
Exchange store will not mount because it cannot see active directory, sites and services issue.error 0x8007077f seen in logs, here is how to fix.Process MSEXCHANGE AD TOPOLOGY SERVICE.EXE
What to do if you find your domain controller on your network will only boot into directory services restore mode.When booting a domain controller you find that your server will only boot into directory services restore mode. Here is the solution.
If you would like to stop organisational units from being deleted,there is a few things you can do. here is a guide on how to step OU`s from being deleted accidentley.