Hello everyone,

I am desperately trying to set up my first hybrid environment for a customer and am hoping for your support and advice.

We have migrated three mailboxes from the local on-premises Exchange installation to the cloud. But now I am faced with the problem that public folders are used on the local instance and the users with the online mailboxes no longer have access? I have already found the following article at Microsoft but this does not work for me and I am really at a loss at the moment.

I have installed an Exchange Server 2019 locally with the following build, version 15.2 (build 858.5)

https://docs.microsoft.com/de-de/exchange/collaboration-exo/public-folders/set-up-legacy-hybrid-public-folders?redirectedfrom=MSDN

I also have the problem that internal mails cannot be sent from the cloud to the local mailboxes because we still have an Active Directory with an aaa.local domain at the customer. Unfortunately, this domain cannot be added in the Admin Portal, how can this be avoided if such installations are still present?

What are your experiences with such constellations or solutions? Or do I have to migrate the public folders to the cloud so that they are available for everyone, i.e. cloud and local?

Thank you

Greetings Jens