When I try to sign in to ArcGIS Online through the ArcMap File menu (version 10.0 final), I get a Sign On Failure message that says "Unable to connect to ArcGIS Online." I can connect through my web browser with no problem.
We are looking into this issue. It appears to be specific to one machine. If anyone else is having similar problems and had a previous beta version of ArcGIS 10 installed on their system, the first thing to try is to go to another machine if possible, and see if you can sign on on that machine. If so, then it's the particular machine that is the problem. If you have previously installed ArcGIS Desktop beta versions and modified any registry settings, you'll need to clean those up.
I have the same problem, although ArcMap just crashes as soon as i click the sign on button. Also i never had a beta version of 10 installed. I have saved as a layer file an arcgis online data set i got through the website and it will show up in my mxd only when it feels like it, sometimes its there others times i get the lovely red exclamation points and trying to reset the data source will not fix it.
>When I try to sign in to ArcGIS Online through the ArcMap File menu (version 10.0 final), I get a Sign On >Failure message that says "Unable to connect to ArcGIS Online." I can connect through my web browser >with no problem.
Me too same thing ArcGis 10 final, just upgraded. Bumps me out at the password screen. Password works fine in browser. Thanks.
Did you explicitly register your global ID with ArcGIS Online? You need to do this first. The reason you have to register is because when you do, you get a workspace with up to 2 GB of free storage where you can add GIS items. We don't allocate this space until you register.
To register, do this:
From the ArcGIS.com website, click the Sign In link on the upper right.
Click the Register your Esri Global Account link underneath Not a Member?
Enter your Esri Global account user name and password and click Register.
Now, you should be able to sign in from ArcGIS Desktop.