Cached mode no longer works with NTLM authentication

Not open for further replies.


Senior Member
Outlook version
Email Account
Exchange Server
Im using OL 2010 on a hosted exchange server. The host must have updated something the other day even though they deny it as my home computer that was left on, and logged in overnight had a message that because of admin changes I needed to log out and then back in. After powering up my office computer which was off at night would say it was connected to the exchange server (in cached mode) and I would see new messages, but when I tried to create or modify and OL item OL would just hang.

Deleting the OST file didnt help although working in non cached mode did appear to work OK (authentication still set NTLM).

I changed the proxy settings from use NTLM authentication to basic authentication and it now appears to be working OK again in cached mode. My question is unless someone can comment on the actual cause of the problem, in simple terms what am I sacrificing by switching to basic authentication?

Not open for further replies.
Thread starter Similar threads Forum Replies Date
A Outlook 2016 in Cached Mode Using Outlook 1
N Shared mailbox in cached mode Using Outlook 0
L Outlook Office 365 cached mode crashing Using Outlook 0
R Microsoft Outlook 2010 - Non Cached Mode Using Outlook 0
B Configure Outlook so Exchange uses cached mode but new items are by default saved to Using Outlook 1
P Reply All does not work in Outlook 2010 Cached mode Using Outlook 4
N Email Stuck in Outbox - Cached Mode - Roaming Profile Using Outlook 2
U Cached mode additional mailboxes Using Outlook 2
K Outlook Cached Mode - can't create rules to move email to another mailbox Using Outlook 2
W disabled cached mode, but Outlook still using OST Using Outlook 2
S Cached Exchange Mode and roaming users Using Outlook 5
P Outlook 2010 search of PST files doesn't work unless in cached mode Using Outlook 3
S Outlook 2007 and cached mode issues Using Outlook 0
S Exchange 2010 outlook 2010 outlook anywhere cached mode Exchange Server Administration 2
G Access room/equipment mailboxes in cached mode Exchange Server Administration 5
M Outlook 2007 (cached mode), Exchange 2010 - Cant download Offline Address Book Exchange Server Administration 6
F Shared Calendars Missing All Items When In Cached Mode Using Outlook 2
R Outlook 2010 cached mode cannot see GAL but Outlook 2007 can via Exchange 2010 Using Outlook 2
H Outlook 2010 l No sync at home Office with DSL Internet Connection (cached Mode) Using Outlook 2
G Outlook in Cached Mode Issue Using Outlook 2
S Outlook 2011 - Use Cached Exchange Mode Using Outlook 1
A Cached Exchange Mode for Additional Mailbox Using Outlook 3
M Outlook 2010 cached mode registry entry Using Outlook 2
S Outlook 2010 - Cached/Offline Mode and Local File Sever Using Outlook 2
Z Exchange 2010 / Outlook 2010 cached mode Exchange Server Administration 4
L Outlook 2010 Cached mode - Refresh HTML Email Image Using Outlook 1
W outlook cached exchange mode : many write operations to ost file Using Outlook 3
J Outlook in cached mode with exchange 2010 doesn't update Using Outlook 4
P Migrate profile - cached mode setting Using Outlook 2
S Unable to enumerate Mailboxes in NON Cached Mode (if more than 2) Outlook VBA and Custom Forms 8
L how to set downloaded cached emails Using Outlook 5
P Where are the cached emails stored? Using accounts in Outlook 2
R Mailto link inside Outlook 2010 being cached? Using Outlook 1
B Is personal archive email is cached in server memory? Exchange Server Administration 5
N Outlook Anywhere Not Updating Local Cached Password After Reset - Client Stays Disconnected Using Outlook 2
K Where is the connection settings for the Exchange Management Console cached? Exchange Server Administration 6
C Outlook 2007 "Updating Cached Messages" Using Outlook 2
W Receiving messages in offline mode Outlook VBA and Custom Forms 1
F "This action is not available in the current mode" Using Outlook 0
C Outlook 2016 Username Not Working in Scheduling Assistant (Cache Mode) Using Outlook 0
P Categorise emails on sending - macro not working in Preview mode Using Outlook 1
Diane Poremsky Say No! to Compatibility Mode New Articles 0
oliv- "Online mode with Exchange server" vs "online" Exchange Server Administration 2
Diane Poremsky Outlook Only Starts in Safe Mode? New Articles 0
R Outlook won't run except in Safe mode problem Using Outlook 5
P Outlook in safe mode Using Outlook 2
TMok Outlook 2010 nop responds after I resumed the Wins8 from sleep mode Using Outlook 0
J BCM Crashing with Add-in Enabled in User Mode BCM (Business Contact Manager) 2
R Outlook Cache Mode Terminalserver disable through Registry Using Outlook 1
G Why won't VBA see a copied calendar in cache mode anymore? Outlook VBA and Custom Forms 20
Similar threads