'Automatic update of links has been disabled' Enable content?

[katatutu]

I have a standard excel file which I have used for several weeks. It is an accounts file and has several worksheets (one for each client). There are numerous macros. The file is usually kept in a dropbox and is accessed by both Office 2007 and 2010. It has suddenly started to appear with the above message on loading the file. My questions are 1) What are the links it refers to and 2) what is the significance of this? and finally how can I disable this message from showing each and every time? Thanks in advance.

 

[katatutu]

Just as an addition, I was able to try and find a way to list the links and it gives mention to the same file from our other business. I am unable to find out how or where they are linked. There is certainly no formulae making reference to another file.

 

[katatutu]

Anyone?