Update 1/20/2022: We have edited this post for clarity based on customer feedback.
Over the last few years, we have invested heavily in Microsoft Graph to enable developers to access the rich data ...
Updated Jan 20, 2022
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We have contacts and contact lists that can be used in Outlook in order to send mails. Some of the contacts and contact lists (hundreds of contacts) should be accessable by only certain users. Therefore we have set permissions on those public folders. Only users that have the necessary roles can see and use the contacts and contact lists.
We use public folders because our consultants (MS partner) said it's the best way to do it. (even as we pointed out that public folders are deprecated)
Is there a way to implement our problem with some other APIs?
Yesterday the problem seemd to be solved but today we are facing the same problem (You have exceeded the available concurrent connections for your account) is back.