I am not able to sign in gettting message as need permissionfrom admin & admin not aware to allow
OnePlaceMail needs permission to access resources in your organization that only an admin can grant. Please ask an admin to grant permission to this app before you can use it.
Admin is not aware where to allow on same
Thank you for your inquiry.
Can you go to https://aad.portal.azure.com/ and go to Users and Groups > User Settings
After that, check if the Enterprise Application option is set to yes. if not then please check it to YES and save
Note that this change may take some time to propagate, around 24 hours.