Check Mirror and Witness Status Before Rebooting

The following script, meant to run as part of a pre-check for automated reboots, will check that all mirrored databases are in a Synchronized status and the witness is in a Connected status.  If the above conditions are true, the script returns a 0 exit code, otherwise, it returns < 0.
See for more on mirroring quorum.

Add User/Group to Local Administrators Group

The follow will prompt to add a given domain user/group to local admins on multiple boxes