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Email Alerts are not received...

In one of application, Email alerts are sent using SQL sp_send_dbmail stored procedure. Email alerts were working properly, but suddenly noticed email alerts are not received.

To troubleshoot the issue, first I checked the msdb.dbo.sysmail_event_log table using the below query.

SELECT log_id, event_type, log_date, description, process_id, mailitem_id, account_id, last_mod_date, last_mod_user
log_date DESC

If there is any error, you should see records with the event_type value as error.
In my case there are records with event_type value as error, and the description value for those records is same as below

The mail could not be sent to the recipients because of the mail server failure. (Sending Mail using Account 3 (2018-02-01T10:41:27). Exception Message: Cannot send mails to mail server. (The SMTP server requires a secure connection or the client was not authenticated. The server response was: Authentication required).  )

As per the error descript…

MDX Rank

Normally we use MDX Rank function to get the rank value considering just one dimension level. But I face an situation that Rank value needed to be taken considering two dimension levels. As an example needed to get the Rank of Sales value of stores, which related to a Region.
I was unable to find a direct solution and after doing some researches I was able to build the MDX query.
The query is given below.

MEMBER [Measures].[Rank] AS
{[Measures].[Rank], [Measures].[Sales]} ON 0,
{[Store—Region_Store].[Store].MEMBERS} ON 1
where {[Store—Region].[All Store—Region].[Region1]}

If we give the region value as Region1, then what this query does is it rank only the stores which are related to the Region1 region. If the Region1 region contains 5 stores, the highest rank value you will get is 5.
Hope this will help for you as well...