My colleague noticed that her email account on the MX Plan service was blocked for spam by OVH.
After it was unblocked, some Outlook calendar events disappeared. I opened a ticket to retrieve them, but OVH told me that the plan I have does not support calendars.
If a support ticket was opened because your email account was blocked, feel free to share this information with the representative who helped you unblock the affected email address.
I see that an answer has already been provided, and I confirm it.
Since your email address is an oldMxplan address, calendar synchronization with OVHcloud servers is impossible. In your case, the calendar was stored only locally, so it will not be possible to recover that data, I'm sorry.
To benefit from calendar synchronization, feel free to migrate your address(es) to an Exchange offer; since your current offering is on the oldmxplan infrastructure, you can migrate quickly and easily:
Note: if the domain is already used in an Email Pro or Exchange platform, you must place the order from the client area by going to your mail platform, then to the "Email accounts" tab, and "Order accounts".
Step 2 of 2: Automatic migration of your account:
• Go to your client area and your MXplan mail offer,
• Click the three small dots and use the migrate button,
• Select the new platform (Email Pro or Exchange).
Note: The migration cannot succeed if you have forwards, filters, or an autoresponder on your mailbox.