How to turn off upgrade message in Umbraco backoffice - umbraco

Question

Is it possible to turn off the Umbraco upgrade message in the Umbraco backoffice. Don't necessarily want my users to see this.

Answer 1

There is an umbracoVersionCheckPeriod key in appSettings section of the web.config that has the default value of 7. Set this to 0 to prevent "a new version is available" balloon.
<add key="umbracoVersionCheckPeriod" value="0" />
http://our.umbraco.org/wiki/reference/webconfig
EDIT:
For umbraco version 7 this key might not be present in the web.config by default but you can add it manually and the notification will disappear.
http://our.umbraco.org/documentation/Using-Umbraco/Config-files/webconfig7

Answer 2

for umbraco 8 add
add this key in appsettings section in the web.config
<add key="Umbraco.Core.VersionCheckPeriod" value="0" />
https://our.umbraco.com/forum/using-umbraco-and-getting-started/98912-how-to-disable-update-notification-backoffice

Answer 3

Umbraco 9 and Umbraco 10
Add VersionCheckPeriod to the appsettings.json.
{
"Umbraco": {
"CMS": {
"Global": {
"VersionCheckPeriod": 0
}
}
}
}
When this value is set above 0, the backoffice will check for a new version of Umbraco every 'x' number of days where 'x' is the value defined for this setting. Set this value to 0 to never check for a new version.
References:
https://our.umbraco.com/Documentation/Reference/Configuration/GlobalSettings/index-v9
https://our.umbraco.com/Documentation/Reference/Configuration-for-Umbraco-7-and-8/webconfig/
The code for the API controller is also here: https://github.com/umbraco/Umbraco-CMS/blob/e626fca2432582f052cb13654eedd9e60ef8723f/src/Umbraco.Web.BackOffice/Controllers/UpdateCheckController.cs#L47