Calendar sharing is not available with the following entries because of permission settings on your network

A user came up to me this morning and informed me that they couldn’t share their calendar with a colleague, as they keep getting the error message “Calendar sharing is not available with the following entries because of permission settings on your network.”

Basic troubleshooting steps showed that this issue is simular to error is 0x80070057-00000000-00000000 and all that was really required to resolve it was to select the person from the GAL (Global Address List) rather then typing it in manually.

Another factor involved was that this colleague hadn’t been updated in the users Offline Address Book and this was the reason for typing in the email address in the first place. This was resolved by simply downloading the updates to the GAL.

@PCVirus_AU
Titan Solutions