MAPI calls in Outlook Add-in became much slower after Win10 Creator - Microsoft Community

have outlook add-in. it's complex enough , performs many actions. after win10 creator update (release 1703) actions became slowly. concerns many customers uses add-in , installed last win10 update.
tried investigate problem via debugging 1 action - reading of 100 msg-files , insert in outlook folder.
on prev version of win10 (before creator update) process ~24-25 files per second. after creator update process 3-4 files per second (the same files).
firstly thought it's problem of remote files access because use unc path server \\server-7\olx, moved files local disk. nothing changed.
in taskmanager see 2 processes loads cpu during read/insert msg-files - "appmodel (2)" , "service host: remote procedure call (2)". afaik rpc used mapi calls. suppose mapi calls became slower because actions in our add-in started working slower.
have last update outlook 2016 - version 1707.
question if problem known , do? how workaround it?

hello,

we know more concern encountering. kindly answer following questions:

• what's version of office used on computer? (home, personal, pro, business, etc.)
• is account connected exchange server?
• is email connected outlook using personal or business domain?
• do encounter same concern if open outlook in safe mode?

Office / Outlook / Windows 10 / Office 2016