====== 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:

  - Go to **File -> Options -> Search** (left pane)
  - Click the **Indexing Options** button
  - Click the **Advanced** button
    * May require admin privileges
    * Microsoft Outlook should be in the list
  - 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!

  * Start a **Command Prompt** as **Administrator**

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

**Or**

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

{{ :internet:mail:outlook_simplified_acct_creation.png?direct&400 |Simplified Account Creation Doesn't Offer EAS}}

==== Two Exchange Accounts ====

<note warning>Microsoft **does not support** using two Exchange accounts in one Outlook Profile.</note>

<note tip>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.</note>

<note tip>You can also configure **multiple Outlook profiles** and have Outlook prompt you for which profile at Outlook startup.</note>

To fix a confused Outlook:

  - **Reboot** the PC
  - **Log in as Admin**
  - **Delete all saved credentials** pertaining to Outlook or Exchange:
    - **Control Panel -> Credential Manager -> Windows Credentials**
    - ''control.exe /name Microsoft.CredentialManager''
  - **Log in as the user**
    - Don't open Outlook
  - **Delete** the user's Outlook Profile (or create another)
  - **Recreate** the Outlook Profile
    - **Do NOT ever select to save any passwords**
  - :!: 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:

<file>
outlook.exe /safe
</file>

==== Disable Plugins ====

To determine which Outlook plugin is causing a problem:

  - Disable all plugins
  - Re-enable plugins one at a time
    * You probably want to enable the anti-virus plugin first

Disable all plugins:

  - **File -> Options -> Add-in -> Go** (button next to "Manage: Com-in Add"
  - If there are any add-ins, clear the checkbox to disable them
  - Close Outlook, wait a few seconds, then restart it

Enable plugins one at a time while testing for problems:

  * **File -> Options -> Add-in -> Go** (button next to "Manage: Com-in Add"
  * Enable one plugin (check the box) at a time
  * Restart Outlook between tests
  * Repeat the above procedure for each plugin you want to re-enable
  * Once the problem reappears, you have found which add-in is the cause
  * Leave the problem add-in disabled and either live without it or pursue a fix