ANSWER:
To enrich your experience when playing Ubisoft titles, we provide the ability to track your completed actions and earn game-specific rewards. All of this is done via your Ubisoft Account.
Linking a Console to your Ubisoft Account
Linking Facebook to your Ubisoft Account
Linking Steam to your Ubisoft Account
Linking Epic to your Ubisoft Account
Linking Twitch to your Ubisoft Account
Unlinking a console or service from your Ubisoft Account
Linking a Console to your Ubisoft Account
To link your Ubisoft Account to a console platform, simply access Uplay through a Uplay-enabled game on your console, and either create a Ubisoft Account or login with an existing Ubisoft Account to create the link.
Note: There is no logout option through Uplay on the consoles.
Alternatively, you can visit and log on to the Account Management section of the Uplay website https://account.ubisoft.com. Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. This section will display which platforms you have linked to your Ubisoft Account and which ones you have yet to link.
Below, you will see that an Xbox Gamertag and a PSN ID have both been linked to this Ubisoft Account while a Facebook account is not currently linked.
From there, you can choose the console you wish to link.
Click Link Account below the associated platform you wish to link.

You will be prompted in a separate window to log in to that console’s user account. You may need to have pop-up windows enabled for this site for it to display correctly.

After entering in the correct login credentials for your console’s login, you will receive a message such as the following:

If you receive an error during the linking process, you may already have your console account ID (XBL Gamertag or PSN ID) linked to a different Ubisoft Account. If you have more than one Ubisoft Account, log into your other account(s) on the Account Management section of the Uplay website, https://account.ubisoft.com, to see the existing account links.
If you need help finding which Ubisoft Account is linked to your PSN ID or XBL Gamertag, please contact Ubisoft Customer Support. Please be sure to include your XBL Gamertag or PSN ID in the ticket.
Once we receive the information, we will do what we can to assist you.
See instructions BELOW for how to unlink a console from your Ubisoft Account.
Linking Facebook to your Ubisoft Account
To link your Ubisoft Account to your Facebook account, simply visit the Account Management section of the Uplay website: https://account.ubisoft.com.
Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. Next, click the Link Account button under the Facebook icon.

After that, you may get a pop-up window asking you to log in to your Facebook account.

Once you’ve logged in, you will get a confirmation that you have linked your Facebook account.

Linking Steam to your Ubisoft Account
Simply go to your Steam games Library, and launch an installed Uplay-enabled game from Steam. If you are not already logged in to your Uplay Client for PC, you will be prompted to log in.

After that, you will see a window offering you the opportunity to Link your account with Steam.

Choose Link accounts, and the link will be created.
Linking Epic to your Ubisoft Account
When you purchase a Ubisoft title from the Epic Games Store, you will be prompted to link your accounts. If you place a preorder or redeem a code, this process will begin when you launch the game for the first time from the Epic client.
If you are using a newly created Epic account, you be prompted to verify the mailing address listed on that account. Once that is complete, you will then be able to link the accounts.
Note: you will need an internet browser to complete the linking process.
You will receive the following pop-up. Clicking "Link Your Account" will open your default browser.

In the browser, you will be asked to log in to your Ubisoft account. Please make sure this is your main account!


Once you log in, the accounts will be linked! You may then navigate back to the Epic Games client.

Linking Twitch to your Ubisoft Account
To link your Ubisoft Account to your Twitch account, simply visit the Account Management section of the Uplay website: https://account.ubisoft.com.
(Information about Twitch Drops can be found HERE.)
Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. Next, click the Link Account button under the Twitch icon.

After that, you may get a pop-up window asking you to log in to your Twitch account. You will not receive this pop-up if you are already logged in to a Twitch account.

Once you’ve logged in, you will get a confirmation that you have linked your Twitch account.

NOTE: Twitch users will need to unlink accounts from both Twitch and Ubisoft. Ubisoft unlinking steps can be found below.
Twitch users will need to navigate to Settings, and then to Connections (here). Next, locate UbisoftConnect under Other Connections.

Click Disconnect. You we be asked to confirm before completing the process.

For details on the Twitch Drop program, please review this article HERE.
Unlinking a console or service from your Ubisoft Account
To unlink a console or other service from your Ubisoft Account, simply visit the Account Management section of the Uplay website: https://account.ubisoft.com
Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. Next, click the Unlink button under the platform you wish to unlink from your Ubisoft Account.
After clicking Unlink, a pop-up window will appear to confirm the platform has been unlinked.

Once you confirm with YES, you will have unlinked your Ubisoft Account from that console or service.
Twitch Unlink: Twitch users will need to unlink their account from both Twitch and Ubisoft.
WiiU:
Please note that the Ubisoft Club app on the Wii U has been disconnected. Review the notification HERE.
If you wish to continue to unlink your Ubisoft Account from your WiiU, please contact our Customer Support team HERE to help you complete this. Please be sure to include your Nintendo Network ID in the ticket.
Linking a Console to your Ubisoft Account
Linking Facebook to your Ubisoft Account
Linking Steam to your Ubisoft Account
Linking Epic to your Ubisoft Account
Linking Twitch to your Ubisoft Account
Unlinking a console or service from your Ubisoft Account
Linking a Console to your Ubisoft Account
To link your Ubisoft Account to a console platform, simply access Uplay through a Uplay-enabled game on your console, and either create a Ubisoft Account or login with an existing Ubisoft Account to create the link.
Note: There is no logout option through Uplay on the consoles.
Alternatively, you can visit and log on to the Account Management section of the Uplay website https://account.ubisoft.com. Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. This section will display which platforms you have linked to your Ubisoft Account and which ones you have yet to link.
Below, you will see that an Xbox Gamertag and a PSN ID have both been linked to this Ubisoft Account while a Facebook account is not currently linked.

From there, you can choose the console you wish to link.
Click Link Account below the associated platform you wish to link.

You will be prompted in a separate window to log in to that console’s user account. You may need to have pop-up windows enabled for this site for it to display correctly.

After entering in the correct login credentials for your console’s login, you will receive a message such as the following:

If you receive an error during the linking process, you may already have your console account ID (XBL Gamertag or PSN ID) linked to a different Ubisoft Account. If you have more than one Ubisoft Account, log into your other account(s) on the Account Management section of the Uplay website, https://account.ubisoft.com, to see the existing account links.
If you need help finding which Ubisoft Account is linked to your PSN ID or XBL Gamertag, please contact Ubisoft Customer Support. Please be sure to include your XBL Gamertag or PSN ID in the ticket.
Once we receive the information, we will do what we can to assist you.
See instructions BELOW for how to unlink a console from your Ubisoft Account.
Linking Facebook to your Ubisoft Account
To link your Ubisoft Account to your Facebook account, simply visit the Account Management section of the Uplay website: https://account.ubisoft.com.
Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. Next, click the Link Account button under the Facebook icon.

After that, you may get a pop-up window asking you to log in to your Facebook account.

Once you’ve logged in, you will get a confirmation that you have linked your Facebook account.

Linking Steam to your Ubisoft Account
Simply go to your Steam games Library, and launch an installed Uplay-enabled game from Steam. If you are not already logged in to your Uplay Client for PC, you will be prompted to log in.

After that, you will see a window offering you the opportunity to Link your account with Steam.

Choose Link accounts, and the link will be created.
Linking Epic to your Ubisoft Account
When you purchase a Ubisoft title from the Epic Games Store, you will be prompted to link your accounts. If you place a preorder or redeem a code, this process will begin when you launch the game for the first time from the Epic client.
If you are using a newly created Epic account, you be prompted to verify the mailing address listed on that account. Once that is complete, you will then be able to link the accounts.
Note: you will need an internet browser to complete the linking process.
You will receive the following pop-up. Clicking "Link Your Account" will open your default browser.

In the browser, you will be asked to log in to your Ubisoft account. Please make sure this is your main account!


Once you log in, the accounts will be linked! You may then navigate back to the Epic Games client.

Linking Twitch to your Ubisoft Account
To link your Ubisoft Account to your Twitch account, simply visit the Account Management section of the Uplay website: https://account.ubisoft.com.
(Information about Twitch Drops can be found HERE.)
Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. Next, click the Link Account button under the Twitch icon.

After that, you may get a pop-up window asking you to log in to your Twitch account. You will not receive this pop-up if you are already logged in to a Twitch account.

Once you’ve logged in, you will get a confirmation that you have linked your Twitch account.

NOTE: Twitch users will need to unlink accounts from both Twitch and Ubisoft. Ubisoft unlinking steps can be found below.
Twitch users will need to navigate to Settings, and then to Connections (here). Next, locate UbisoftConnect under Other Connections.

Click Disconnect. You we be asked to confirm before completing the process.

For details on the Twitch Drop program, please review this article HERE.
Unlinking a console or service from your Ubisoft Account
To unlink a console or other service from your Ubisoft Account, simply visit the Account Management section of the Uplay website: https://account.ubisoft.com
Navigate to the Account Information tab, and you will see Linked Accounts at the bottom of the page. Next, click the Unlink button under the platform you wish to unlink from your Ubisoft Account.
After clicking Unlink, a pop-up window will appear to confirm the platform has been unlinked.

Once you confirm with YES, you will have unlinked your Ubisoft Account from that console or service.
Twitch Unlink: Twitch users will need to unlink their account from both Twitch and Ubisoft.
WiiU:
Please note that the Ubisoft Club app on the Wii U has been disconnected. Review the notification HERE.
If you wish to continue to unlink your Ubisoft Account from your WiiU, please contact our Customer Support team HERE to help you complete this. Please be sure to include your Nintendo Network ID in the ticket.