Table of Contents

Troubleshooting Outlook

Delete and Rebuild the Local Cache

https://www.msoutlook.info/question/reset-mailbox-sync-cache-exchange-or-imap

Outlook 2016

The search feature in Outlook relies on indexing the user's PST (personal store/database) files. If search indexing is disabled, search will be very slow.

Rebuild Search Index

In Outlook 2016:

  1. Go to File → Options → Search (left pane)
  2. Click the Indexing Options button
  3. Click the Advanced button
    • May require admin privileges
    • Microsoft Outlook should be in the list
  4. Click the Rebuild button
    • Wait until the process completes to test
    • The time it takes to complete varies depending on the number of emails and PST file size

Disable Simplified Account Creation

Newer Outlook 2016 versions may not present the EAS option during account setup. A registry edit is necessary to disable the Simplified Account Creation and enable the EAS account type option.

https://wiki.zextras.com/wiki/ZxMobile_Outlook_Configuration

https://wiki.zimbra.com/wiki/Unable_to_create_Zimbra_profile_with_Outlook_2016

:!: Exit Outlook before editing the Registry! 

REG ADD HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Setup /v DisableOffice365SimplifiedAccountCreation /t REG_DWORD /d 1 /f

Or

  1. Using regedit.exe, open this registry subkey: 
    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook\setup
  2. Create a new DWORD (32-bit) Value named DisableOffice365SimplifiedAccountCreation
  3. Set the value to 1

Simplified Account Creation Doesn't Offer EAS

Two Exchange Accounts

Microsoft does not support using two Exchange accounts in one Outlook Profile.
It may be possible to get two Exchange accounts in one Outlook profile to work, as long as you do not save the passwords for either account. However, if you do save either password, Outlook may stop functioning…usually on the second account.
You can also configure multiple Outlook profiles and have Outlook prompt you for which profile at Outlook startup.

To fix a confused Outlook:

  1. Reboot the PC
  2. Log in as Admin
  3. Delete all saved credentials pertaining to Outlook or Exchange:
    1. Control Panel → Credential Manager → Windows Credentials
    2. control.exe /name Microsoft.CredentialManager
  4. Log in as the user
    1. Don't open Outlook
  5. Delete the user's Outlook Profile (or create another)
  6. Recreate the Outlook Profile
    1. Do NOT ever select to save any passwords
  7. :!: Be careful to change the username on the second account when prompted with the wrong one!

Outlook 2010

http://social.technet.microsoft.com/Forums/en-US/outlook/thread/0b9942d3-78df-4421-9ebd-3d7df940f076/

http://support.microsoft.com/default.aspx?scid=kb;EN-US;970920

Safe Mode

Outlook Safe Mode disables all plugins, which are the most common causes of problems.

In Outlook 2010 on Windows 7, you just hold down the control key when clicking the Outlook icon to start Outlook in Safe Mode.

In older (any) versions of Windows, you can run this command in the Run dialog box: 

outlook.exe /safe

Disable Plugins

To determine which Outlook plugin is causing a problem:

  1. Disable all plugins
  2. Re-enable plugins one at a time
    • You probably want to enable the anti-virus plugin first

Disable all plugins:

  1. File → Options → Add-in → Go (button next to “Manage: Com-in Add”
  2. If there are any add-ins, clear the checkbox to disable them
  3. Close Outlook, wait a few seconds, then restart it

Enable plugins one at a time while testing for problems: