For more information, see Change the phone numbers on your audio conferencing bridge.Automatic updates are the easiest way to keep your version of Skype for Mac OS X up to date. This is a complex scenario that requires additional steps. When a phone number from a audio conferencing bridge is unassigned.When you move the user to a new audio conferencing bridge.When you change or reset the conference ID for a user configured to use public meetings.When you enable or disable audio conferencing for a user.Also note that support for third party audio conferencing providers is scheduled for end of life on April 1, 2019, as previously announced. For more information, see Assign Microsoft as the audio conferencing provider. When you change the audio conferencing provider of a user from any other provider to Microsoft, provided the user is assigned a Microsoft Audio Conferencing license.
When you assign or remove a Microsoft Audio Conferencing service license to a user, and that user is not enabled for a third-party audio conferencing provider.In the following cases, MMS will update existing Skype for Business and Microsoft Teams meetings to add, remove, or modify dial-in coordinates: Some UNICODE characters in the body of the invite might be incorrectly updated to one of the following special characters: ï, ¿, ½, �.Meetings with more than 250 attendees (including the organizer) won't be migrated.Note that the actual meeting notes stored in OneNote will still be there it is only the link to the shared notes that is overwritten. The link to the shared meeting notes in the calendar item and also from within the Skype meeting also will be overwritten.If your meeting organizers have attached content to the meetings in advance, the content will need to be recreated after MMS runs. Meeting content that was created or attached to the meeting (whiteboards, polls, and so on) won't be retained after MMS runs.
If a user copies and pastes the Skype online meeting information from one meeting to a new meeting, that new meeting won't be updated since there is no meeting in the original service.
Therefore, if a user has edited that block, their changes will be overwritten.