What is not an option when a user is exporting contacts to share with others?

VCARD files
Electronic business cards
XML
CSV

When a user is exporting contacts to share with others, CSV (Comma Separated Values) is not an option.

To determine what is not an option when exporting contacts to share with others, we can evaluate each choice.

1. VCARD files: This is a valid option when exporting contacts to share with others. VCard (Virtual Contact File) is a standard file format used for storing contact information.

2. Electronic business cards: This is also a valid option when exporting contacts. Electronic business cards are typically used to exchange contact information digitally.

3. XML: XML (eXtensible Markup Language) is a flexible and widely-used file format for storing and transmitting data. It can certainly be used to export contacts for sharing.

4. CSV: CSV (Comma-Separated Values) is a simple file format that stores tabular data, where each line represents a row and each value within a line is separated by a comma. This is often used to export contacts as well.

Based on the evaluation of each option, it appears that there is no option that is not suitable or not an option when exporting contacts to share with others. All of the given choices (VCARD files, electronic business cards, XML, CSV) can be used for this purpose.

Data can be shared (exported) in any format so long as the recipient can read and parse the data.