@mentions in comments working for some external guests but not for others

[christiaanneijens]

When collaborating on a Word document in Teams, I am able to use @mention in comments for some external guest Teams members but not for others. They are both guest users.

What can couse this behavior?

thanks

Christiaan

[#2]

Hi @christiaanneijens   This recent post in our answers.microsoft.com tech support forum might give you some insight.  If not, feel free to open your own ticket at that site: Using @mention in Word online for Guest users - Microsoft Community

[#3]

It's a known limitation:
@mentions does not work with guest or external accounts (you cannot @mention such accounts nor can such accounts @mention in files outside of their tenant).

https://insider.office.com/en-us/blog/mentions-for-comments-in-word-excel-and-powerpoint-available-t...

Please vote: https://feedbackportal.microsoft.com/feedback/idea/40e2deee-f543-ec11-a81a-0022484e21f1