KB439209: "The username or password you entered is incorrect" error appears after upgrading to iOS 11 and logging into MicroStrategy Mobile 10.9

SYMPTOM
In Strategy Mobile 10.9 support for iOS11 started as per the following Article. However, after the upgrade of the iOS to version 11, Strategy Mobile 10.9 users see the following error message after attempting to log in.

The username or password you entered is incorrect

• In Strategy Developer 10.9, create a user object and define the Developer login parameter with an apostrophe, as shown below: 
  

• Try logging in from Strategy Mobile app 10.9 in iOS 11.x using that user created in step 1, as shown below.
  

• Notice the error message shown at the beginning of this article.

CAUSE
This issue is not caused by Strategy Mobile; it is caused by the character used by the iOS mobile device keyboard being a "curly single close quote" (Alt 0146) while the one used from a regular keyboard is an "apostrophe" (Alt 39). This issue is not specific to Strategy as it happens because the two characters are different and the usernames do not match.
Note: For more information on characters and their alt codes, click here.
ACTION
Use one of the two solutions to fix this issue:

• In the iOS 11 mobile device, navigate to
  

  
  settings > general > keyboard > Smart Punctuation

  
  Disable smart punctuation, as shown below. This will ensure the apostrophe from the iOS keyboard uses the correct alt code.
  

• In Strategy Developer 10.9, the Strategy Administrator can edit the user(s) that contain an apostrophe in their Developer Login parameter and replace the apostrophe with the "curly single close quote" using the alt code: (Alt+0146).
  
  Caveat: by making this change, the users will have to use this alt code in Strategy Web now to log in successfully to Strategy Web 10.9.

   KB439209