Our custom domain's Microsoft Mail server To Google App Mail server migration:
We have the Microsoft Exchange custom domain mail server for our business which has been created as a free service previously and it was hosted in outlook.com (mail server). We have almost 20 accounts created in it. At last we would like to go with Google domain for Business (mail server).
In each account we have important email with attachments also, we have some documents in skydrive cloud server.
Now the challenging thing is we have to migrate all email and documents to the Google mail server. How it can be achieved?
Could you please help us to resolve this? any idea please?