Added/updated FAQ

FAQ.md

@@ -128,7 +128,7 @@ FairEmail follows all the best practices for an email client as decribed in [thi
 * [(65) Why are some attachments shown dimmed?](#user-content-faq65)
 * [(66) Is FairEmail available in the Google Play Family Library?](#user-content-faq66)
 * [(67) How can I snooze conversations?](#user-content-faq67)
-* [(68) Why can Adobe Acrobat reader not open PDF attachments / Microsoft apps not open attached documents?](#user-content-faq68)
+* [~~(68) Why can Adobe Acrobat reader not open PDF attachments / Microsoft apps not open attached documents?~~](#user-content-faq68)
 * [(69) Can you add auto scroll up on new message?](#user-content-faq69)
 * [(70) When will messages be auto expanded?](#user-content-faq70)
 * [(71) How do I use filter rules?](#user-content-faq71)
@@ -143,6 +143,7 @@ FairEmail follows all the best practices for an email client as decribed in [thi
 * [(80) How can I fix 'Unable to load BODYSTRUCTURE'?](#user-content-faq80)
 * [(81) Can you make the background of the original message dark in the dark theme?](#user-content-faq81)
 * [(82) What is a tracking image?](#user-content-faq82)
+* [(83) What does 'User is authenticated but not connected' mean?](#user-content-faq83)
 
 [I have another question.](#support)
 
@@ -1134,15 +1135,15 @@ By selecting a zero snooze duration you can cancel snoozing.
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 <a name="faq68"></a>
-**(68) Why can Adobe Acrobat reader not open PDF attachments / Microsoft apps not open attached documents?**
+**~~(68) Why can Adobe Acrobat reader not open PDF attachments / Microsoft apps not open attached documents?~~**
 
-Adobe Acrobat reader and Microsoft apps still expects full access to all stored files,
+~~Adobe Acrobat reader and Microsoft apps still expects full access to all stored files,~~
-while apps should use the [Storage Access Framework](https://developer.android.com/guide/topics/providers/document-provider) since Android KitKat (2013)
+~~while apps should use the [Storage Access Framework](https://developer.android.com/guide/topics/providers/document-provider) since Android KitKat (2013)~~
-to have access to actively shared files only. This is for privacy and security reasons.
+~~to have access to actively shared files only. This is for privacy and security reasons.~~
 
-You can workaround this by saving the attachment and opening it from the Adobe Acrobat reader / Microsoft app,
+~~You can workaround this by saving the attachment and opening it from the Adobe Acrobat reader / Microsoft app,~~
-but you are advised to install an up-to-date and preferably open source PDF reader / document viewer,
+~~but you are advised to install an up-to-date and preferably open source PDF reader / document viewer,~~
-for example one listed [here](https://github.com/offa/android-foss#-document--pdf-viewer).
+~~for example one listed [here](https://github.com/offa/android-foss#-document--pdf-viewer).~~
 
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@@ -1346,6 +1347,17 @@ FairEmail automatically removes the link of such images, which makes such images
 
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+<a name="faq83"></a>
+**(83) What does 'User is authenticated but not connected' mean?**
+
+This is likely a confusing Microsoft Exchange (Office365) message telling that the password is invalid.
+
+Less likely is  that you are synchronizing too many folders.
+This can also happen due to abruptly losing connectivity resulting in not properly closing connections.
+
+So, double check the password or reduce the number of folders to synchronize.
+
+<br />
 
 ## Support