Yes, a user can share files stored in the Rcloud storage with internal & external users respectively. There is also option to share files securely with password & OTP.
Yes, Rcloud is a licensed feature & it is available as part of mobile app named Rediffmail Professional in google playstore & apple store respectively.
All office documents like docx, xlsx, ppt, pdf is supported. You can create & edit office related documents online.
Yes, it allows multiple users to edit same file simultaneously. Different colour codes for each user will help another user to understand that same file is being edited by other user too.
There is a plugin that can be installed on a user's machine & it will then sync the data available in a respective folder with the online storage. So, the user need not upload the file every time, just save the files in the folder & it will sync automatically with the online storage.
You can also create a shared mailbox for delegation. Use your existing account, and delegate some responsibility to other members of your team. For example, you could grant limited access of your account to your assistant, who can then help you organize your emails, follow up with people, and more.
If a user replies to a message in a shared mailbox, the reply appears to come from the shared mailbox email address. A user can also (if they have permission to do so) send a message on behalf of a shared mailbox. The message will appear to come from Username on behalf of Shared Mailbox