How to Start a Desktop Sharing Session with Your Contact
Prerequisites: To initiate a desktop sharing session and to gain access to other user's desktop, the user must be signed-in to Comodo Unite in the remote machine. If the user has granted automatic remote access to you with:
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the password type authentication, you must know the password set for you.
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the certification type authentication, your digital certificate should have been installed in their system.
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both the password and certification type, you must know the password and your digital certificate should have been installed in their system.
To initiate a remote desktop control
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Right click on the contact in the Contacts/Network's list and select Desktop Sharing.

Or
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Initiate a conversation with the contact and select the 'Remote' button at the top of the conversation dialog.

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If the user has set the Desktop Control Policy for you as 'Allow remote access when I click Accept', wait till the user accepts your Remote Desktop Control request.
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If the user has set the Desktop Control Policy for you as 'Allow automatic remote access', you will be granted access depending on the authentication type set for you.
Password Only - If the user has set the 'Password Only' authentication type to allow automatic remote access, you will be prompted to enter the password.
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Enter the password informed to you by the other user and click 'OK'. A remote desktop connection will be established.
Certification Only - If the remote-user has set 'Certification Only' as the authentication type then their installation of Comodo Unite will require your machine to provide your email (access) certificate. This certificate will be used to authenticate your identity. If the authentication process is successful then your connection request will be authorized.
Password and Certification - If the remote-user has set 'Password and Certification' as the authentication type then you will have to both enter the correct password AND you will need to have an email (access) certificate installed on your system (as described above). Requiring two forms of authentication in this manner is a very secure practice known as 'Two-Factor Authentication' and is strongly advocated by Comodo.

