"Critical extension is unavailable"

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

Hi all,

I'm totally new to this LDAP stuff so my apologies if these questions
seem ridiculous. I have a problem to troubleshoot where an application
tries to query MS AD for usernames and gets the error "Critical
extension is unavailable".

The error only seems to occur when the username 'seems not to be' found
in AD. I say 'seems not to be' because the queried records do exist in
the AD server queried by the application.

However, there are multiple AD servers in use, and this leads to my
first question:

1. Is it possible to set one AD server to refer or link to another, so
that if an application queries one server, the queried server forwards
the query to another server?

The second question is about trying to replicate the error by
simulating the query sent by the application:

2. Is there a tool that can be used for sending "free form" queries to
MS AD?

Third question - a brief answer or URL with an explanation would just
be fine:

3. What is the "extension" referred to by the error message?

thanks in advance...

JJ

.

Relevant Pages

  • Re: Non-existent A record being returned...
    ... ; Query 1 ... These DNS servers are set up to forward queries to two other DNS ... Nslookup has it's own resolver service, and doesn't rely or use Windows resolver service, or the local cache, but rather directly queries DNS, where I'm assuming you're referring to clearing the DNS server cache? ...
    (microsoft.public.windows.server.dns)
  • Re: MailMerge hangs and crashes with Access on Server
    ... All I know is that the performance of queries depends to a large extent on whether, for example, a join is performed on the client side, or on the server side, incurring no network traffic and potentially benefitting from caching on the server. ... I have mapped out the path to the final query that is used to get to the letters - and have found that it is quite tortuous indeed - utilizes 8 queries and multiple tables to get there, does about 20 calculations along the way. ... There are no dialog boxes, and actually, I have now split the database, and have kept the Word templates and the Access frontend locally on my machine, and moved the backend to the server. ...
    (microsoft.public.word.mailmerge.fields)
  • Re: Do I understand form optimization correctly?
    ... queries on an Access database. ... Access is file based, not server based. ... If you run any query on the table, the entire table is brought down to ...
    (comp.databases.ms-access)
  • Re: Basic design question for a distributed application - How to access applications data
    ... The main data the application manipulates is a list of Queries. ... query is a custom object containing an SQL statement and some ... My server is where my list of queries will reside. ... My client will display that list of queries and enable the user to ...
    (microsoft.public.dotnet.languages.vb)
  • Re: Passing values
    ... Use the comma as the separator list (excerpt if you have set the Windows' ... menu for the Queries Window. ... You can also use a view and set the Server Filter but that's another story. ... > figure out how to pass a value from a form to the query. ...
    (microsoft.public.access.adp.sqlserver)