Does nextPageToken in Get Lead Activities expires after some time?

[Anonymous]

Does nextPageToken in Get Lead Activities expires after some time? Lets say I get first 300 lead changes and a nextPageToken, Can I store this token in my database and use it to get the next set of records anytime or should I use it within sometime frame ?

[Kenny_Elkington]

Strictly speaking, no it doesn't expire, but it's not necessarily a good idea to use it this way.

[Anonymous]

What is the recommended way to keep track of the records imported so far and import the next set of records with considerable gap in between ?

ActivityDate or ActivityId may be?

[Kenny_Elkington]

Generally using the data of the most recently retrieved activity as a high watermark is the best way.  You can use this to retrieve a new token for subsequent retrievals.