Outlook 2016 oab not updating in cached mode
2003 server is still in the enviornment but its services are turned down.everything is migrated to 2010 server , including OAB , public folders and most of the system folders.I turned on exchange 2003 services and after sometime redownloaded the address book and it worked.. then I increased level of logging and noticed an event like this : ------------- OABGen encountered error 80040115 while cleaning the offline address list public folders under /o=company/cn=addrlists/cnefault Offline Address List. - \Default Offline Address List ------------- I noticed that some 2003 OAB related systemfolders were not replicated to exchange 2010 , I added 2010 server as a replica then tried again .Please make sure the public folder database is mounted and replicas exist of the offline address list folders. those errors went away but I got a warning this time : ---- OABGen could not generate full details for some entries in the offline address list for address list '\Global Address List'.
When you have Cached Exchange Mode enabled, Outlook by will by default cache the main Global Address List as well.
there is one system folder in 2003 that couldn't be replicated to new enviornment ( gives access denied error ) and is called " system configuration" I see lots of related threads but none of them solved my issue .