• Outlook User
  • New Outlook app
  • Outlook.com
  • Outlook Mac
  • Outlook & iCloud
  • Developer
  • Microsoft 365 Admin
    • Common Problems
    • Microsoft 365
    • Outlook BCM
    • Utilities & Addins

Maximum number of Exchange accounts in an Outlook profile

Slipstick Systems

› Exchange Server › Maximum number of Exchange accounts in an Outlook profile

Last reviewed on November 8, 2019     67 Comments

Applies to: Outlook 2019 (Win), Outlook 2016 (Win), Outlook 2013, Outlook 2010

Account Settings iconBeginning with Microsoft Outlook 2010, you can open more than one Exchange account in your Outlook profile.

So how many Exchange Accounts can you add to an Outlook 2010, Outlook 2013, 2106, or Outlook 2019 profile?

In Microsoft Outlook 2013 and newer, the default is 10 accounts and the maximum allowed is 9999 accounts. Outlook 2010 supports up to 15 accounts in your profiles, but, by default it is limited to 5 accounts.
max number of exchange accounts reached warning

If the administrator wants to allow more (or less) than the default number of accounts, he or she needs to edit the registry or apply a group policy.

The relevant Group Policy key for all supported versions of Outlook is:

HKEY_CURRENT_USER\Software\Policies\Microsoft\Exchange
DWORD: MaxNumExchange
Outlook 2010 values: a decimal value between 1 and 15
Outlook 2013 values: a decimal value between 1 and 9999
Outlook 2016 values: a decimal value between 1 and 9999
Outlook 2019 values: a decimal value between 1 and 9999

Add MaxNumExchange key

In the Group policy editor, the setting is under Outlook > Account Settings > Exchange > Set maximum number of accounts per profile.

If you prefer not to add it as a policy, use these keys instead. Note: if you are using the consumer or Business version of Outlook 2013 and newer, you may need to use these keys instead.

HKEY_CURRENT_USER\Software\Microsoft\Exchange
DWORD: MaxNumExchange
Outlook 2010 values: a decimal value between 1 and 15
Outlook 2013 values: a decimal value between 1 and 9999
Outlook 2016 values: a decimal value between 1 and 9999
Outlook 2019 values: a decimal value between 1 and 9999

add the dword to raise the limit

The new setting won't take affect until you restart Outlook.

 

Do it for me

To set the registry key to allow 15 accounts, use this registry file. This works with Outlook 2010, 2013, 2016, or 2019. (In HKCU\Software\Microsoft\*)
15 Accounts, user keys
This registry file will set a Policy key to allow up to 15 Exchange accounts; works with Outlook 2010, 2013, 2016, or 2019.
(In HKCU\Software\Policies\*)
15 accounts

Maximum number of Exchange accounts in an Outlook profile was last modified: November 8th, 2019 by Diane Poremsky

Related Posts:

  • Prevent users from adding email accounts to Outlook
  • Changing the default *.pst and *.ost data file sizes
  • How to Remove the Primary Account from Outlook
  • Set an End Date on Recurring Appointments

About Diane Poremsky

A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.

Subscribe
Notify of
67 Comments
newest
oldest most voted
Inline Feedbacks
View all comments

Daniel (@guest_220484)
August 9, 2023 4:42 pm
#220484

Ive added the key to the registry, but it would be pretty helpful to add to the article that one needs to right click, modify, choose decimal and enter value 1-9999 for number of accounts.
End result would be a key called MaxNumExchange \ REG_DWORD \ 0x0000270f (9999)

0
0
Reply
awpmi (@guest_220169)
March 18, 2023 12:31 am
#220169

FYI

In the following article from MS in 2022, they DO say you can have multiple Exchange accounts open in Outlook, if you basically have full access to them. They list the versions, and it goes back to 2010.

https://learn.microsoft.com/en-us/outlook/troubleshoot/profiles-and-accounts/issues-that-occur-when-adding-multiple-exchange-accounts

quote:
"In Microsoft Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019 and Outlook for Microsoft 365, you can add multiple Microsoft Exchange accounts to the same profile if one of the following conditions is true: "

0
0
Reply
Diane Poremsky(@diane-poremsky)
Author
Reply to  awpmi
March 18, 2023 1:32 am
#220171

You can add multiple accounts to a profile if you have the username and password - that is what my article is about.

The article you linked to refers to shared mailboxes added as accounts. For example, your own mailbox has full access permission on a mailbox and you add the mailbox as an account, using a username and password. When you do this, some features will be buggy.

0
0
Reply
Richard Hemes (@guest_220029)
January 27, 2023 10:52 am
#220029

What is the length of the UNIQUE PASSWORD LIST for Outlook 2013?

0
0
Reply
Rajeev Velankar (@guest_219890)
December 2, 2022 11:36 am
#219890

Does this apply for Office 365 Outlook Application installed on Windows 10

0
0
Reply
Diane Poremsky(@diane-poremsky)
Author
Reply to  Rajeev Velankar
December 4, 2022 9:33 pm
#219894

Yes, it uses the Outlook 2016 keys. Default is 10 accounts.

0
0
Reply
amelie (@guest_218623)
August 13, 2021 12:57 pm
#218623

Does this also work for non exchange email accounts ? If not is there another tutorial for non exchange email accounts

Thanks

0
0
Reply
Diane Poremsky(@diane-poremsky)
Author
Reply to  amelie
August 14, 2021 9:17 pm
#218628

You shouldn't need a key with pop and IMAP accounts - they should allow unlimited.

Did you hit a limit and if so, how many accounts are in your profile?

0
0
Reply
amelie viennot (@guest_218621)
August 13, 2021 8:52 am
#218621

Hi Diane

Is there a way to increase the limit of non-exchange email accounts that we can add to outlook ? I am talking about increasing the limit of gmail and yahoo accounts that we can add on the outlook app

I have been searching a lot online but all I find is how to increase the limit for exchange accounts ..

Thanks

Last edited 2 years ago by amelie viennot
0
0
Reply
Diane Poremsky(@diane-poremsky)
Author
Reply to  amelie viennot
August 14, 2021 9:23 pm
#218630

How many account are in your profile and did you receive a message that you can't add more? I don't recall a limit to the number of internet accounts in a profile.

0
0
Reply
Ajay Kumar (@guest_218362)
June 9, 2021 12:09 am
#218362

It's not working. As simple as that. And I cannot find any entry named outlook in the group policy editor. I'm using outlook 365 on Windows 10 Pro.

0
0
Reply
Diane Poremsky(@diane-poremsky)
Author
Reply to  Ajay Kumar
June 9, 2021 12:14 am
#218363

You need the office admin templates to use the group policy editor. The registry files I have linked in the article will set the key for 15 - if you need more, you can open the registry editor and change the value.

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Exchange]
"MaxNumExchange"=dword:00000015

0
-1
Reply
Leu (@guest_214265)
November 8, 2019 1:27 pm
#214265

Hi, just for information:
Office 2016 professional plus
You have to go to HKEY_CURRENT_USER\ Software\ Microsoft\ Exchange and add DWORD32bit with MaxNumExchange and decimal 15 (15 for example).
It is described above and works perfect.

Thanks a lot!

1
0
Reply

Visit Slipstick Forums.
What's New at Slipstick.com

Latest EMO: Vol. 28 Issue 27

Support Services

Do you need help setting up Outlook, moving your email to a new computer, migrating or configuring Office 365, or just need some one-on-one assistance?

Subscribe to Exchange Messaging Outlook






Our Sponsors

CompanionLink
ReliefJet
  • Popular
  • Latest
  • Week Month All
  • How to Remove the Primary Account from Outlook
  • Adjusting Outlook's Zoom Setting in Email
  • Move an Outlook Personal Folders .pst File
  • Save Sent Items in Shared Mailbox Sent Items folder
  • Remove a password from an Outlook *.pst File
  • Outlook Auto Account Setup: Encrypted Connection not available
  • Outlook: Web Bugs & Blocked HTML Images
  • This operation has been cancelled due to restrictions
  • Create rules that apply to an entire domain
  • Use PowerShell to get a list of Distribution Group members
  • How to Block Foreign Spam
  • Automatically Open New Outlook when Windows boots
  • Block External Content in New Outlook
  • Save Messages in New Outlook
  • Send Individual Messages when Sending Bulk Email
  • Centrally managed signatures in Office 365?
  • Create a rule to delete spam with no sender address
  • Open Outlook Folders using PowerShell or VBScript
  • Cannot add Recipients in To, CC, BCC fields on MacOS
  • Change Appointment Reminder Sounds
Ajax spinner

Newest Code Samples

Delete Old Calendar Events using VBA

Use PowerShell or VBA to get Outlook folder creation date

Rename Outlook Attachments

Format Images in Outlook Email

Set Outlook Online or Offline using VBScript or PowerShell

List snoozed reminders and snooze-times

Search your Contacts using PowerShell

Filter mail when you are not the only recipient

Add Contact Information to a Task

Process Mail that was Auto Forwarded by a Rule

Recent Bugs List

Microsoft keeps a running list of issues affecting recently released updates at Fixes or workarounds for recent issues in Outlook for Windows.

Outlook for Mac Recent issues: Fixes or workarounds for recent issues in Outlook for Mac

Office Update History

Update history for supported Office versions is at Update history for Office

Outlook Suggestions and Feedback

Outlook Feedback covers Outlook as an email client, including Outlook Android, iOS, Mac, and Windows clients, as well as the browser extension (PWA) and Outlook on the web.

Use Outlook.com Feedback for suggestions or feedback about Outlook.com accounts.

Other Microsoft 365 applications and services




Windows 10 Issues

  • iCloud, Outlook 2016, and Windows 10
  • Outlook Links Won’t Open In Windows 10
  • Outlook can’t send mail in Windows 10: error Ox800CCC13
  • Missing Outlook data files after upgrading Windows?

Outlook Top Issues

  • The Windows Store Outlook App
  • The Signature or Stationery and Fonts button doesn’t work
  • Outlook’s New Account Setup Wizard
  • Outlook 2016: No BCM
  • Exchange Account Set-up Missing in Outlook 2016

Repair PST

Convert an OST to PST

Repair damaged PST file

Repair large PST File

Remove password from PST

Merge Two Data Files

Sync & Share Outlook Data

  • Share Calendar & Contacts
  • Synchronize two computers
  • Sync Calendar and Contacts Using Outlook.com
  • Sync Outlook & Android Devices
  • Sync Google Calendar with Outlook
  • Access Folders in Other Users Mailboxes

Contact Tools

Data Entry and Updating

Duplicate Checkers

Phone Number Updates

Contact Management Tools

Diane Poremsky [Outlook MVP]

Make a donation

Mail Tools

Sending and Retrieval Tools

Mass Mail Tools

Compose Tools

Duplicate Remover Tools

Mail Tools for Outlook

Online Services

Calendar Tools

Schedule Management

Calendar Printing Tools

Calendar Reminder Tools

Calendar Dates & Data

Time and Billing Tools

Meeting Productivity Tools

Duplicate Remover Tools

Productivity

Productivity Tools

Automatic Message Processing Tools

Special Function Automatic Processing Tools

Housekeeping and Message Management

Task Tools

Project and Business Management Tools

Choosing the Folder to Save a Sent Message In

Run Rules on messages after reading

Help & Suggestions

Submit Outlook Feature Requests

Slipstick Support Services

Buy Microsoft 365 Office Software and Services

Visit Slipstick Forums.

What's New at Slipstick.com

Home | Outlook User | Exchange Administrator | Office 365 | Outlook.com | Outlook Developer
Outlook for Mac | Common Problems | Utilities & Addins | Tutorials
Outlook & iCloud Issues | Outlook Apps
EMO Archives | About Slipstick | Slipstick Forums
Submit New or Updated Outlook and Exchange Server Utilities

Send comments using our Feedback page
Copyright © 2023 Slipstick Systems. All rights reserved.
Slipstick Systems is not affiliated with Microsoft Corporation.

wpDiscuz

Sign up for Exchange Messaging Outlook

Our weekly Outlook & Exchange newsletter (bi-weekly during the summer)






Please note: If you subscribed to Exchange Messaging Outlook before August 2019, please re-subscribe.

Never see this message again.

You are going to send email to

Move Comment