Add to Office 365 calendar link
Microsoft 365 work and school accounts live on a different host than personal Outlook.com accounts. Same parameters, different domain, and a link built for one fails for the other. For a B2B audience this is the variant that matters most.
Rather not build the URL by hand? The generator does all of this, including the encoding.
Generate a linkThe URL format
https://outlook.office.com/calendar/0/deeplink/compose
?path=/calendar/action/compose
&rru=addevent
&subject=Q4+product+webinar
&startdt=2026-09-10T12:00:00Z
&enddt=2026-09-10T13:00:00Z
&body=A+45+minute+session
&location=Meeting+room+2Why you cannot detect the account type
Nothing in the browser tells you whether a visitor has a personal or a work Microsoft account. Some tools guess from the email domain, which breaks the moment someone at a company uses a personal account, or the reverse.
The honest answer is to show both and label them clearly. In a B2B newsletter, put the work variant first: that is what most of your readers have.
Tenants that block deeplinks
Some enterprise tenants restrict which external URLs open in Outlook on the web, and the deeplink lands on a policy page. You cannot work around that from the outside, so always keep an .ics download in the list. It goes through the desktop client, which those policies rarely touch.