Microsoft 365 has been disrupted since 12 November 2026. Mailboxes in Exchange Online are unavailable at times, Outlook does not connect, and emails arrive late or not at all. Microsoft is working on a fix. It is still open when the service will run reliably again.

If you would rather not wait: with our Exchange ActiveSync solution you can be reached by email again right away. You receive new mail directly with us. As soon as Microsoft 365 is running again, you simply transfer your emails, contacts and calendars to us.

New mail arrives directly with us, your existing data follows later.

How the switch works

1. Mailboxes with usYou order a mail hosting plan and create your email addresses. Exchange ActiveSync is already included in the plan.

2. New mail right awayAs soon as the MX record of your domain points to us, new mail lands directly in your mailbox with us. You can also send again from then on.

3. Your data followsAs soon as Microsoft 365 is running again, you simply transfer your mail, contacts and calendars to us.

What Exchange ActiveSync offers with us

All devices in syncMail, calendars and contacts are always up to date on your phone, tablet and in your mail program.

Calendars and contactsAppointments and addresses are stored on the mail server. In the browser you use OfficeMail for this, with nothing to install.

Data in SwitzerlandYour mailboxes are stored on our own servers in Switzerland and are operated by us.

How to get started

Order the Mail Server Standard or Mail Server Plus plan and create your email addresses. If your domain is with us, change the MX record in the DNS management of the customer area. If it is with another provider, adjust the record there.

As soon as Microsoft 365 is running again, you simply transfer your existing emails, contacts and calendars to us. If you have questions about the switch, open a ticket at https://www.firestorm.ch/en/support/.

Order Standard   Order Plus