Beginning 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 or Outlook 2013 profile?
Microsoft Outlook 2010 supports up to 15 accounts in your profiles. But, by default it is limited to 5 accounts.
In Outlook 2013 and 2016, the default is 10 accounts and the maximum allowed is 9999 accounts.
If the administrator wants to allow more (or less) than the default number of accounts, he or she need to edit the registry or apply a group policy.
The relevant Group Policy key for either Outlook 2010, Outlook 2013, or Outlook 2016 is:
HKEY_CURRENT_USER\Software\Policies\Microsoft\Exchange
DWORD: MaxNumExchange
Outlook 2010 values: a number between 1 and 15
Outlook 2013 values: a number between 1 and 9999
Outlook 2016 values: a number between 1 and 9999
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, you may need to use these keys instead.
HKEY_CURRENT_USER\Software\Microsoft\Exchange
DWORD: MaxNumExchange
Outlook 2010 values: a number between 1 and 15
Outlook 2013 values: a number between 1 and 9999
Outlook 2016 values: a number between 1 and 9999
The new setting won't take affect until you restart Outlook.
Do it for me
This registry file will set the number of accounts at 15; works with Outlook 2010, 2013, or 2016.
15 accounts
A registry file to set the value to 15 accounts outside of the policy key, use this registry file. This works with Outlook 2010, 2013, or 2016.
15 Accounts, user keys
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44 Comments on "Maximum number of Exchange accounts in an Outlook profile"
This worked great for Windows but I cant find anywhere on if this is possible to do for MAC. I just bought a new MacBook Pro and would like to add all my exchange and Outlook accounts but I get stuck after the 5 one. I have researched everywhere and cant find anything on this for the MAC.
I will ask about it.
Just to check. how can we limit exchange mail box creation limit to 2 ? is it possible .
Example.-
How can we restrict users from creating corporate email account in their personal laptops. can we disable or limit to 1 per user ID ?
You can control it in computers covered by corporate policy but it's a policy setting, not a mailbox setting, AFAIK you can't control it on user-owned computers. I hav looked at mobile device policies but I'm pretty sure they only apply to small devices, not laptops and home computers.
You can turn off remote access and force everyone to use OWA, but that can be less productive in the long run.
Hi,
You explain that one can have several Exchange accounts in an Outlook profile.
However, https://support.microsoft.com/en-us/kb/291626 "How to manage multiple Exchange mailbox accounts in Outlook" states that “you can only have one service in your Exchange Server profile”.
So, what is the difference between the two ?
Does it mean that you cannot have both “me@myExchAccount.com” and “you@myExchAccount.com” Office 365 email Exchange accounts in the same Outlook profile? - I asking this before purchasing a second office 365 email Exchange account.
Hi, I get this but want to automate the creation/addition of email accounts process. So that one doesn't need to enter server details one at a time. Say I have a CSV with all the IMAP and SMTP server info and user account and password info. How can I automate the account creation process for say 50 accounts to be cr3ated within one profile?
is it posisble to automate account creation. I need to add 100 accounts to outlook and all have the same server details just different email credentials. Can i use a csv file to create mutiple accounts in outlook?
A CSV won't work. Outlook can only set the accounts up using a PRF - and a prf only makes sense if you frequently reformat the computer.
Hi Diane,
thanks for this great information.
Do you know if there is a limit in Exchange 2013 of users accessing simultaniously the same mailbox? We have a customer who has6 employees working in the same mailbox, but we can only access the mailbox with 5 users at the same time?
Any toughts?
Thanks
Arjan
i m facing same issue at my organization, did you find any solution for your issue
AFAIK, there is no set limit, but there is a limit to the number of open RPC/MAPI calls. To minimize issues, used cached mode. If there are a lot of items in the folders, reducing the number of items in the most frequently used folders can help.
We have a common mailbox which is configured on 5 systems but when we are trying to configure it on 6th system at the same time when it is used on 5 system, its giving an error "cannot open your default email folders, you must connect to Microsoft Exchange with the current profile before you can synchronize your folder with your offline folder file. We have MS Office 2007 installed on all the systems. Please help me out with the solution.
This is 6 separate profiles? Can that computer connect to other mailboxes or to the shared mailbox if the other outlook profiles are closed?
No, it a common mailbox (1 profile) which i want to configure on around 10 systems but it only works on 5 at a time, when we try to configure it on 6th it gives out the above mentioned error.
it didn't show Exchange option under Microsoft in regedit. Kindly help
If the registry keys do not exist, create them. Outlook only creates keys when an option is changed - default settings don't have keys. Settings under the Policies keys only exist when a policy is set.
Does your office 365 plan support litigation hold? You could put all of the mailboxes on hold - users won't be affected but they won't be able to delete mail.
The 15 second cycle is how frequently Outlook and the Server ask each other if there are changes that need synced.