We had same problem and received the advice below which fixed it.
The Mailboxes.db is damaged. You have to delete it:
- Go to the server manager
- Stop the server
- Go to Program Files/Graphisoft/BIM Server/BIMcloud server 18/Mailboxes folder, and delete the Mailboxes.db file
- Go back to the server manager
- Start the Server
This should fix the communication issues.
Thank you very much Aaron, we could solve the problem following your steps.
Upto AC 22
iMacs and MacBookPros: Mac OS X (10.6 to 10.12, Intel core 2 Quad to i5, i7, 8 GB to 16GB)
Win 10, AMD Opteron 6-Core x 2, 16GB, FirePro W4100 2GB
& ThinkPad E550
& i7, 8GB