Hi!
I have a strange problem in my Exchange 2013 CU9 environment.

Outlook clients (2013 fully patched, also 2016 and 2010) configured up with cached mode  and RPC over http hangs.

Steps to reproduce the issue:

1: Create a new outlook profile.

2: Set the client to use cached mode

3: start client and it freezes and drops connections now and then. Syncing of the largest folders never finishes.

Steps to fix:

1: Disable cached mode and client works fine.

We use a netscaler loadbalancer and if I point my client directly to one of the exchange servers cached mode works but not via netscaler. All other service works fine like owa, activesync.

Microsoft Connectivity analyzer gives no errors.

Also:

C:\Windows\system32>netsh int ipv4 show int

 

Idx     Met         MTU          State                Name

---  ----------  ----------  ------------  ---------------------------

  1          50  4294967295  connected     Loopback Pseudo-Interface 1

 25           5        1300  connected     Local Area Connection* 12

 24          10        1500  connected     ExchangeTeam

• Edited by Harmankardon 19 hours 12 minutes ago