What is the sync interval for signatures in Exchange Online?

I’ve recently installed eM Client on a new Windows device. Because of issues with accessing shared mailboxes on my old device, I chose to not migrate settings and accounts from the old device, and instead went through all the settings and added all accounts manually. The only thing remaining is the signature for my Exchange account, which is a Microsoft 365 account with a Exchange Online license.

The default setting for signatures in eM Client is to sync them from the server, if the service supports it. On my old device, I had configured signatures locally, and I had no signatures saved in the cloud at https://outlook.office.com.

To avoid having to migrate signatures again in the future, I added my signature in Outlook on the web, but it has yet to show up in eM Client. Is there any information about the sync interval for signatures in Exchange Online?

I’ve tried manually syncing and restarting the application. The signature from Gmail shows up in eM Client, so the sync is working for that account at least.