Microsoft
Outlook 2010 supports up to 15 accounts in your profiles. But, by default it is
limited to 5 accounts.
In Outlook 2013
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 or Outlook 2013 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
In the Group
policy editor, the setting is under Outlook > Account Settings > Exchange >Set maximum number of accounts per
profile.
Or, you can add
it to the current user hive 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
