Open EMS:
Get-AddressList | Update-AddressList
Get-GlobalAddressList | Update-GlobalAddressList
Get-OfflineAddressBook | Update-OfflineAddressBook

Restart outlook or update outlook offline address book under Send/ Receive Groups:

Virtual Reality Powered Computer
Open EMS:
Get-AddressList | Update-AddressList
Get-GlobalAddressList | Update-GlobalAddressList
Get-OfflineAddressBook | Update-OfflineAddressBook
Restart outlook or update outlook offline address book under Send/ Receive Groups:
using exchange powershell command:
New-MailboxExportRequest -Mailbox UserName -FilePath “\\server\export\username.pst”
During my exchange 2010 to exchange 2016 migration I run in to outlook connectivity problem which made it impossible to connect.
There are hundreds of similar issues on google unfortunately none of them solved the problem until I found two solutions on separate blogs and combined them and here is my final fix:
References:
windows disk management:
PowerShell: (to disable integrity streams)
Links:
http://www.careexchange.in/creating-refs-volumes-for-exchange-20132016/
https://www.veeam.com/blog/advanced-refs-integration-coming-veeam-availability-suite.html
https://www.vladan.fr/veeam-and-refs-best-practices-and-benefits/