I thought it may be a network problem so I tried to sync my files in other iPads with PDF Expert APP ,howerver ,it didn't work.
And I also tried to re-authorize then I found it didn't work either.
I can sign in to SkyDrive account .But when I tried to click 'yse' to authorize PDF Expert to access my SkyDrive account ,the app told me that "unable to Sign In to SkyDrive".
Is there anyone else who has been trapped by this problem?
How can I solve it?
Thanks.
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