sys.servers will return results specific to whatever Instance you are connected to. It has no clue about other Instances which are installed on the machine. Recommended way is to make...

A quick Bing search landed me here...
https://blogs.msdn.microsoft.com/sql_pfe_blog/2016/12/22/create-index-monitoring-progress/

Not sure how critical the subscriber is for your business to be available and how large the DB is, but I would recommend comparing data in pub and sub table(s)...

Interesting...If allow_anonymous and immediate_sync is set to false, the newly created snapshot should include only newly added articles(in theory). So the rows which it's complaining about, are they from newly...

Hello,
Looks like it is appending data to your existing tables. Is it complaining on newly added articles or existing ones(I am guessing existing tables)? Just curious, Do you have...

100% agree with Sue, Paul is the best when it comes to deciphering CheckDBs. If you are concerned about VLDBs, these two specific  articles might be helpful:
https://blogs.msdn.microsoft.com/sqlserverstorageengine/2006/10/19/checkdb-part-6-consistency-checking-options-for-a-vldb/

I haven't run into this, but hope the below references have something useful for you to troubleshoot the issue. 
https://dba.stackexchange.com/questions/165501/configure-unconstrained-delegation-for-bulk-insert
https://thesqldude.com/2011/12/30/how-to-sql-server-bulk-insert-with-constrained-delegation-access-is-denied/

Hi Ronnie,
When using Gmail, you have to enable POP and IMAP and port number should be 587 for smtp.gmail.com. Refer to this article for detailed instructions
https://mssqltrek.com/2011/08/16/configuring-sql-server-db-mail-to-send-emails-to-your-gmailyahoo-mail/

I could be wrong but I don't think you can use a single Linked Server to pull from multiple Excel files. My 2 cents, An SSIS package would be way...

Was the Listener Online when you tried making a connection? What is the Quorum configuration?

Mainstream supported is already gone long ago(July 2014). Extended support will be ended in July 2019.

Great question. Had to pause for a moment to think and I got it right.