How to Fix the Microsoft Forms Co-Author Limit Reached Error
Question details
Users are unable to join or edit a form because the collaboration link displays an error stating the co-author limit has been reached.

- Product
- Microsoft Forms
- Device & OS
- not provided
- Scenario
- Attempting to access a shared Microsoft Forms collaboration link to co-author or edit the form alongside team members.
- Observed behavior
- The system blocks access and displays a 'co-author limit reached' error, preventing new collaborators from joining the form.
Ensure you can contact the original creator (owner) of the form, as only the form owner has the necessary permissions to view, manage, and remove existing collaborators.
Verify and Manage the Collaborator Count
Check if the form has exceeded the 100 co-author limit and consolidate individual users into groups to free up space.
Microsoft Forms has a strict hard limit of 100 co-authors per form. This limit counts both individual users and Microsoft 365 Groups. However, a group counts as only one collaborator regardless of how many members it contains. Reorganizing your collaborators into groups is the most effective way to bypass individual limits.
Reach out to the person who originally created the form and ask them to open the form in their Microsoft Forms dashboard.
Have the owner click on the 'Share' or 'Collaborate' button at the top right of the screen to view the list of people who currently have editing access.
Identify and remove any individuals who no longer need edit access to bring the total number of co-authors below 100.
Instead of adding people individually, create a Microsoft 365 Group for your team, add all necessary individuals to that group, and then share the form with the single group email.

Troubleshoot General Collaboration Link Issues
Determine if the error is caused by a glitch with a specific link or form rather than the actual limit being reached.
Try WPS Office for Seamless Collaboration and Data Collection
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- 1. Download and Install: Visit the official WPS Office website and download the free installation package for your operating system.
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Frequently Asked Questions
How many co-authors can a Microsoft Form have at maximum?
Microsoft Forms supports a maximum of 100 co-authors per form. This quota includes a mix of both individual user accounts and Microsoft 365 Groups.
Does adding a Microsoft 365 Group take up multiple co-author spots?
No. A Microsoft 365 Group counts as exactly one co-author spot, regardless of whether that group contains 5 members or 500 members. This makes groups the best workaround for the limit.
Who has the permission to add or remove co-authors on a form?
Only the original creator (the owner) of the Microsoft Form can manage collaboration settings, generate or revoke sharing links, and remove existing co-authors.
Why am I getting the limit error if we have fewer than 100 people?
The error can occasionally trigger due to a bug with a specific collaboration link. If you confirm there are fewer than 100 collaborators, ask the form owner to delete the old sharing link and generate a new one.




