• Skip to main content
  • Skip to primary sidebar

Technipages

Smart phone, gadget and computer tutorials

  • Topics
    • Android
    • Gaming
    • Hardware
    • Internet
    • iOS
    • MacOS
    • Office
    • Software
    • Windows
    • Definitions
  • Product Reviews
  • Downloads
  • About
Outlook 2016: “Use Cached Exchange Mode” Option is Grayed Out

Outlook 2016: “Use Cached Exchange Mode” Option is Grayed Out

By Mitch Bartlett 2 Comments

Solve a problem where you can’t enable Use Cached Exchange Mode in Microsoft Outlook 2016 because it is grayed out.

Note: This option is only available for accounts that are using Microsoft Exchange. Cached Exchange Mode will be grayed out if you only have POP3 or IMAP accounts in Outlook.

The option is also grayed out if you are using Windows Server with Terminal Services installed. There is no workaround for this without removing Terminal Services from the machine.”

“Use Cached Exchange Mode” is likely disabled because of a Group Policy that is in effect on your computer. If you are on a company network, you might want to contact an administrator to disable it. Otherwise, you can try to enable it yourself.

  1. Hold down the Windows key and press “R“.
  2. Type “regedit” and click “OK“.
  3. Click the plus sign next to HKEY_CURRENT_USER, then navigate to the following:
    • Software
    • Microsoft
    • Office
    • 15.0
    • Outlook
    • OST
  4. Right-click the “NoOST” entry on the right and click “Modify“.
  5. Give it a value of “0“.
    Note: Some users report that they assign this value to “3” instead of “0”.
  6. Restart Outlook and the “Use Exchange Mode” option shouldn’t be grayed out anymore.

If these steps don’t work for you or you are unable to perform these steps, you may want to speak with your systems administrator to see if it can be enabled on the back end.

You Might Also Like

  • Outlook 2016: Enable or Disable Cached Exchange ModeOutlook 2016: Enable or Disable Cached Exchange Mode
  • Why is "Junk" Grayed Out in Outlook 2016?Why is "Junk" Grayed Out in Outlook 2016?
  • How to Enable Track Changes Mode in Word 2016How to Enable Track Changes Mode in Word 2016
  • Office 2016 & 2013: How to Enable or Disable DEP ModeOffice 2016 & 2013: How to Enable or Disable DEP Mode
  • How to Connect Outlook 2016 to GmailHow to Connect Outlook 2016 to Gmail
  • Fix Outlook 2016 Won't Startup Because it CrashesFix Outlook 2016 Won't Startup Because it Crashes
  • Outlook 2016: Can't Add Words to DictionaryOutlook 2016: Can't Add Words to Dictionary
  • How to Turn Outlook 2016 Plugins On or OffHow to Turn Outlook 2016 Plugins On or Off

Filed Under: Office Tagged With: Outlook 2016

Reader Interactions

Comments

  1. Dag Calafell says

    December 23, 2018 at 5:00 pm

    No, Administrator permissions did not allow me to turn off cached exchange mode. The regedit instructions above were fine, except that there is no OST key entry for Office 16 (365 subscription). I have to change data files since I don’t use hotmail calendar or contacts. HELP.

  2. VanguardLH says

    August 3, 2018 at 9:22 pm

    Using Outlook 2016 (part of Office 365 subscription). The “Use cached Exchange mode” option is greyed out. I am NOT using Terminal Services. I am NOT using POP or IMAP to access my Hotmail and Outlook.com accounts. OL2016 is using Exchange ActiveSync (EAS). If cached mode is not usable with EAS, why do I see links when viewing folders to retrieve more items from the Exchange server? I don’t want to keep clicking on links to Show More on the server. I want local copies in my local e-mail client.

Did this help? Let us know! Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Primary Sidebar

Recent Posts

  • How to Use Vivaldi Browser on Android
  • Google Sheets: Change Graph Colors
  • Visual Studio: Open Solution Explorer
  • Visual Studio: Reset All Settings
  • Android: How to Recover Deleted Photos
  • Windows 10: Keep a Window Always On Top
  • What Are Wi-Fi Dead Zones and How to Avoid Them
  • How to Transfer Contacts From One Gmail Account to Another

Who’s Behind Technipages?

Baby and Daddy My name is Mitch Bartlett. I've been working in technology for over 20 years in a wide range of tech jobs from Tech Support to Software Testing. I started this site as a technical guide for myself and it has grown into what I hope is a useful reference for all.

Follow me on Twitter, or visit my personal blog.

You May Also Like

  • Page-Mode RAM
  • Protected Mode

© Copyright 2019 Technipages · All Rights Reserved · Privacy