Outlook keeps updating cached headers
You can lock the settings to customize Cached Exchange Mode using the Outlook Group Policy Administrative template.
Or, you can configure default settings by using the Office Customization Tool (OCT).
When configured using RPC outlook says it is connected but says "Updating Inbox" and does not download email.
Sync Slider (the Mail to keep offline slider in the Outlook 2013 Server Settings dialog box) and Exchange Fast Access are two new features that are available by default with Cached Exchange Mode in Outlook 2013.
I changed the client over to Outlook anywhere configured with Negotiate Auth and to work on both fast and slow networks and all i get is "Trying to Connect".
I have no other issues on the other 100 machines using Outlook anywhere or RPC. Tested the connection back to my sharepoint server and all works fine, just the exchange server is denies the connection on any IIS page. The Machine had some weird malware on it a few weeks prior to this commencing that was preventing wireless networks connecting. I have tested RPC ping using the command below and all i get is a hang and it does not display any results except "RPCPing Set Activity ID " using rpcping -t ncacn_http -o Rpc Proxy=myserver.local I have found a temp work around that if i change the IP address to anything else it will work for 2 weeks or so then come back again.
You don’t need to customize Cached Exchange Mode if you don’t want to, though—the default settings are appropriate for most organizations.
If this is your first time using Group Policy template files or Office Customization Tool files, take some time to get familiar with them.