Sync Exchange Server calendars with Microsoft 365 and Gmail
Keep Exchange on your own hardware and still show the same meetings in every calendar your people open. You set it up once, with one service user and no mailbox passwords.
Sound familiar?
Booked twice
Part of your team lives in Exchange, part in Gmail. Nobody sees the whole picture, so people get double-booked.
Copying meetings by hand
Your people retype the same meeting into a second calendar, and sooner or later one copy is wrong.
A migration you do not want
You only want a shared calendar. You do not want to move your whole server to the cloud for it.
No mailbox passwords
AddSync reaches Exchange through one dedicated internal user. Your administrator creates it once and gives it two permissions. After that nobody asks your people for a password, and a password change does not stop the sync.
| Permission | Why |
|---|---|
| Owner on the calendar | Lets AddSync read meetings and write the ones coming from other calendars. |
| Viewer on the whole mailbox | Exchange Web Services (EWS) requires it. |
Connect Exchange in five steps
Your administrator does this once. After that you only add people.
- 1Create one service userA dedicated internal user in Exchange.
- 2Give it permissionsOwner on the calendar, Viewer on the whole mailbox.
- 3Add the source in AddSyncConnect your Exchange Server with that user.
- 4Add your peopleOne by one or by list import, up to the number of licenses.
- 5Choose the directionOne way, the other way or both ways for every source.
Exchange at a glance
| Versions | Exchange Server 2016, 2019 and Subscription Edition |
| What syncs | Calendar events, contacts and tasks |
| Direction | One way, the other way or both ways, set per source |
| Access | One dedicated internal user |
| Passwords | None collected from your people |
| Syncs with | Microsoft 365, Outlook.com, Google, HCL Domino, Apple Calendar (iCloud), CalDAV and Zoom meeting links |
Acme Corp: 40 people on Exchange, 6 in sales on Gmail
The office runs Exchange Server. The sales team works in Google Calendar. Emma Carter in sales books a client call, and it shows in the Exchange calendar of Liam Brooks in the office within the same sync. Liam sees she is busy and schedules his own meeting around it.
Exchange sync questions
Can I sync an on-premises Exchange Server calendar with Microsoft 365?
Yes. AddSync Sync connects an Exchange Server calendar with Microsoft 365, Google Calendar, Outlook.com, Apple Calendar (iCloud) and HCL Domino. You choose the direction for every source.
Which Exchange Server versions does AddSync support?
Exchange Server 2016, Exchange Server 2019 and Exchange Server Subscription Edition (SE). It syncs calendar events, contacts and tasks.
Do my people have to give you their mailbox passwords?
No. AddSync reaches Exchange through one dedicated internal user that your administrator sets up. When a person changes a password, the sync keeps running.
Which permissions does the service user need?
Owner on the calendar and Viewer on the whole mailbox. Exchange Web Services (EWS) requires both for the sync to work.
Can I sync in one direction only?
Yes. For every source you choose one way, the other way or both ways.
Do I need to move Exchange to the cloud?
No. Your Exchange Server stays where it is. AddSync only connects its calendars with the other calendars your people use.
How many people can I add?
As many as the number of licenses you bought. You add them one by one or import a list.
Sync Exchange Server with other systems:
Looking for AI for your Exchange mailbox? See AddSync AI for Exchange Server.
Show the same meetings in every calendar
Start a trial and connect your Exchange Server today.
Microsoft, Exchange and Microsoft 365 are trademarks of the Microsoft group of companies. AddSync is an independent product. Names Emma Carter, Liam Brooks and Acme Corp are examples.
