Owners of groups cannot change membership after migration from Exchange 2013 to O365

We recently migrated from Exchange 2013 to O365 and found the owners of mail groups cannot change the membership.
From my on-premise server, I have removed the owners and added them back and even added new owners but when an owner tires to update the members, they still get the message that -
"Changes to the pubic group membership cannot be saved. You do not have sufficient permission to perform this operation on this object."

I have looked over the information in the links below, but still cannot update the memberships for any groups that were migrated. Any suggestions or help would be greatly appreciated.
Thank you,

John WaterAsked:
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Make sure that you have delegated those rights on the o365 setup.
The migration might not have retained those delegation rules.
John WaterAuthor Commented:
If you are referring to the Default Role assignment Policy and specifically there is a check box in the "MyDistributionGroups" and the "MyDistributionGroupMembership" boxes.

Members are successful in updating memberships for groups created in O365, just cannot modify for those groups created on premise.
Does o365 tie back into your AD using ADFS?

There are several examples for powershell scripts to manage the o365 permissions remotely, maybe that will help.

My guess the GUID was not maintained during the transfer such that eventhough the delegation is set, the group to which it is delegated is not "the same" based on the GUID.
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Vasil Michev (MVP)Commented:
You cannot manage on-prem DGs via Outlook/OWA or any of the Exchange Online management tools. It's explained in the KB article you linked above, which also mentions the usual workaround (dsa/dsquery). Alternatively, you can just recreate the DGs in the cloud.

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John WaterAuthor Commented:
I understand that I cannot manage DGs that I created on premise from the O365 tools.
What I have tried to do is to update the owners from my on premise Exchange server, run DirSync and the owners listed do not have the ability to change the membership.

Having read the KB article a few times, I believe it is finally sinking in.
For groups created on premise, users will not be able to go into the Outlook address book and update the membership like they were able to do in Exchange 2013. They must use one of the admin Tools listed in the KB, is that correct?
Vasil Michev (MVP)Commented:
Yup. That's why its usually preferred to recreate the DGs online, unless you stay in Hybrid.
John WaterAuthor Commented:
Thank you
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