Set maximum number of Exchange accounts per profile: registry value maxnumexchangeUserHKCU\software\policies\microsoft\exchange

Policy ID: L_SetMaximumNumberOfExchangeAccounts
Scope: User Configuration
Supported on: At least Windows Server 2008 R2 or Windows 7
Source: Microsoft 365 Apps / Office Administrative Templates (version 5568.1000)
Category: Microsoft Outlook 2016 › Account Settings › Exchange

Registry

maxnumexchange

REG_DWORDUser

HKCU\software\policies\microsoft\exchange Current key

Enabled value: Depends on the option value
Element: Number of Accounts:
Value type: REG_DWORD
Minimum value: 1

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\software\policies\microsoft\exchange]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"maxnumexchange"=dword:<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKCU\software\policies\microsoft\exchange" /v "maxnumexchange" /t REG_DWORD /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKCU:\software\policies\microsoft\exchange' -Force | Out-Null
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\exchange' -Name 'maxnumexchange' -PropertyType DWord -Value '<enter value>' -Force | Out-Null