Outlook Integration Error
If the trouble is real for you, it is possible that the mailboxes hosted in Exchange Server with Skype for Business client April 2017 update. This particular update deprecates the “Skype for Business Contacts” folder in Outlook. The root cause for this problem is that the client tries to create the “Skype for Business Contacts” folder in the user exchange mailbox and fails. There are two solutions to this.
Clear the Skype for Business cache
Sometimes the cache causes the problem, and its best to clear it, so everything is free, and updated. Follow the steps below:
Repair Microsoft Office and Apps
Office comes with inbuilt troubleshooter which can repair Office. This will make sure if there are files which are either missing or corrupt, will be replaced with a working copy.
Migrate to higher Exchange Server
If its actually an exchange server problem, you can migrate the mailboxes to a higher Exchange server.
Disable the creation of the “Skype for Business Contacts” folder
Technet suggests that you try to add the below-mentioned policy to test, and see if it works. Assign it to a single user, and see if it resolves the issue. Once the policy is applied, the user needs to wait for few minutes, sign-out from the client and Outlook, and try again.
Check if EWS and MAPI Status are ok
You need to open the Configuration Information and check if the MAPI and EWS with OK status. If not, either the configuration for both of them have changed, or the configuration made on your client is incorrect. You will need to ask your admin for the correct configuration.
Reinstall Skype for Business (SFB) Client:
If the Office repair didn’t network for you, you could try reinstalling SFB client and outlook client. Hope this helps.