A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hello Amber,
There are a few reasons why tabs disappear in a shared workbook when someone is editing. In order to isolate the issue, we'll need a few more details:
- Were there changes made before the problem started occurring?
- Have you tried checking for and installing Office updates?
- Are all users who have access to the shared workbook experiencing the same issue?
- Are all the shared files affected?
- Are you subscribed to and using Office 365 for Business?
- Is your device connected to a domain?
- Have you tried running an online Office repair?
We're looking forward to your response.