o365 Bulk Add
timetoreply™ asks for: Offline_Access, User.Read.All, Directory.Read.All, Mail.ReadBasic
Permission reference: https://developer.microsoft.com/en-us/graph/docs/concepts/permissions_reference
User.read.all: Allows the app to read the full set of profile properties, reports, and managers of other users in your organization, on behalf of the signed-in user.
Directory.read.all: Allows the app to read data in your organization’s directory, such as users, groups and apps, without a signed-in user.
Mail.ReadBasic: Allows the app to read email in user mailboxes. Allows the app to read email in the signed-in user’s mailbox, except for body, bodyPreview, uniqueBody, attachments, extensions, and any extended properties. Does not include permissions to search messages.
o365 Individual Add
timetoreply™ requires: Offline_Access, User.Read, Mail.ReadBasic
Gmail Individual Add
timetoreply™ requires: readonly