I created in a demo tenant a Team where the members are assigned by a dynamic group Membership rule.
Is it correct that the mentioning functionality is not working on such groups?
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Can confirm that it should work with dynamic membership, as long as you see the user in the member list you should be able to use both @-mention and @-less mentions.
@Linus Cansbyand @adam deltinger you were right. I was too impatient, after a while, the members of the dynamic group were also displayed as team members. And after that mentioning works...