About 0x8007007b 0x8007007b refers to the Windows activation error code 0x8007007b.
Uninstall malicious programs from Mac.
In our experience the Microsoft call center staffs are much better and positive at handling problems than in the early days of Office product activation.
When product activation started the staff seemed trained to assume that anyone who called after a failed activation was a software pirate and thus treated accordingly.
Check your proxy settings If you use your device both at home and at work, try turning off the proxy settings in Microsoft Edge or Internet Explorer before you install Office.
Use the to check for the corrupted or missing updates or components.