When you connect your calendar, we try to sync all calendars your provider makes available. However, some calendars can’t be synced due to permission or provider restrictions. This is expected behavior and is controlled by your calendar provider—not by our application.
Below are the most common reasons a calendar may not sync and what you can do about it.
Common Reasons Calendars Don’t Sync
1. Read-Only Calendars
Some calendars only allow viewing and don’t permit apps to add or update events.
Examples
Shared calendars without edit access
Calendars you can see but can’t modify
What you can do
Ask the calendar owner to grant full edit access, or
Use a different calendar that allows changes
2. System or Built-In Calendars
Many calendar providers include automatic calendars that don’t support syncing.
Examples
Holidays
Birthdays
Company-wide announcement calendars
What you can do
These calendars usually can’t be synced and can be safely ignored
Create or select a personal or shared calendar instead
3. Shared or Delegated Calendars with Limited Permissions
If a calendar is shared with you, it must allow full access for syncing.
Examples
Assistant or team calendars
Delegated executive calendars
Department calendars with restricted permissions
What you can do
Confirm the calendar is shared with edit permissions
Ask the calendar owner or administrator to update access
4. Work or School Account Restrictions
Organizations often limit which calendars can connect to third-party apps.
Examples
Admin-restricted Microsoft or Google work accounts
Security policies preventing external app access
What you can do
Contact your IT administrator
Ask whether third-party calendar syncing is allowed for your account
5. Changing a user's email address within Office 365
When a user is first authorized through either Individual Connect or Enterprise Connect, the system uses the User Principal Name(UPN) as the email address source for the calendar profile for the connecting user.
If the user’s email address later needs to be updated for example, then the user’s email address in the calendar profile will not reflect this change and will still display the old email address set as the User Principal Name.
Examples
Name change
Old email / UPN:
jane.smith@company.comNew email:
jane.doe@company.comIf the UPN remains
jane.smith@company.com, the calendar profile will still show the old email.
Company domain change
Old email / UPN:
alex@oldcompany.comNew email:
alex@newcompany.comIf only the mailbox is updated and the UPN is not, the system will continue using
alex@oldcompany.com.
What you can do
Update the User Principal Name (UPN)
Ensure the user’s UPN is updated to match the new email address in your identity provider (e.g. Azure AD / Entra ID).Reauthorize the user’s calendar
After updating the UPN, the user will need to reconnect their calendar for the changes to take effect.Verify the update
Once reauthorized, confirm that the correct email address is now showing.
What You’ll See in the App
Calendars that can sync will connect automatically.
Calendars that can’t sync will be skipped.
You may see a message explaining why certain calendars weren’t connected.
This helps ensure your connected calendars stay reliable and up to date.
Still Missing a Calendar?
If you believe a calendar should sync but doesn’t appear:
Check the calendar’s permission settings
Confirm you have edit access
Contact your calendar administrator if it’s a work or school account
Reach out to our support team if the issue persists