why i can not add a mail-enabled security group as member inside Office 365 group

[john john]

I have created a mail-enabled security group inside our Office 365 tenant. and i created an Office 365 group >> but i am unable to add the mail-enabled security group inside the Office 365 group as member or as owner.. any advice? Thanks

[#2]

That's currently not a supported scenario. There is some work being done to enable it.

[#3 · Accepted solution]

@john john M365 Groups do not support nesting of any other group. However, there is a newer preview feature which lets you do this:

Create "nested" groups with Azure AD Dynamic Groups

Similar thread: Why can't I add a mail-enabled security group as member inside Office 365 group 

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