Mark, thank you! I was able to adapt your method to meet my needs - I need to run a few more spot-checks to verify, but it looks like this formula (where the arrEmail is the list of single email addresses being compared to, and S3/Z3 are the parent1/2 email addresses (many of them multiple) which I'm 'looking up').
This results in either "paper" or "email" ... I wasn't sure whether concat was the best way to handle looking up both email columns, but it works; although if there's a more efficient way to do this, I'm open to reworking it to make it less calc-heavy - thanks!
=IF(CONCATENATE(IFERROR(INDEX('Paper Opt-Out Program.xlsx'!arrEmail,MATCH(0,--ISERR(FIND('Paper Opt-Out Program.xlsx'!arrEmail,S3)),0)),""),":",IFERROR(INDEX('Paper Opt-Out Program.xlsx'!arrEmail,MATCH(0,--ISERR(FIND('Paper Opt-Out Program.xlsx'!arrEmail,Z3)),0)),""))=":","Paper","Email")
Netarc,
Try this:
<b>Excel 2007</b><table cellpadding="2.5px" rules="all" style=";background-color: #FFFFFF;border: 1px solid;border-collapse: collapse; border-color: #A6AAB6"><colgroup><col width="25px" style="background-color: #E0E0F0" /><col /><col /><col /><col /><col /><col /><col /><col /></colgroup><thead><tr style=" background-color: #E0E0F0;text-align: center;color: #161120"><th></th><th>S</th><th>T</th><th>Z</th><th>AA</th><th>AB</th><th>AC</th><th>AD</th><th>AE</th></tr></thead><tbody><tr ><td style="color: #161120;text-align: center;">1</td><td style="font-weight: bold;background-color: #C5D9F1;;">P1 Sheet2</td><td style="text-align: right;;"></td><td style="font-weight: bold;background-color: #C5D9F1;;">P2 Sheet2</td><td style="text-align: right;;"></td><td style="font-weight: bold;text-align: right;background-color: #C5D9F1;;"></td><td style="font-weight: bold;text-align: right;background-color: #C5D9F1;;"></td><td style="font-weight: bold;text-align: right;background-color: #C5D9F1;;"></td><td style="font-weight: bold;background-color: #F2F2F2;;">Sheet1</td></tr><tr ><td style="color: #161120;text-align: center;">2</td><td style="font-weight: bold;background-color: #C5D9F1;;">Emails</td><td style="text-align: right;;"></td><td style="font-weight: bold;background-color: #C5D9F1;;">Emails</td><td style="text-align: right;;"></td><td style="font-weight: bold;background-color: #C5D9F1;;">Final Result</td><td style="font-weight: bold;background-color: #C5D9F1;;">P1 Result</td><td style="font-weight: bold;background-color: #C5D9F1;;">P2 Result</td><td style="font-weight: bold;background-color: #F2F2F2;;">Email</td></tr><tr ><td style="color: #161120;text-align: center;">3</td><td style="background-color: #C5D9F1;;">jack@test.net,
jack@yahoo.com,
jack@zyx.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">jack@yahoo.com,
jack@zyx.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">Email</td><td style="background-color: #C5D9F1;;">jack@test.net</td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #F2F2F2;;">jack99@test.net</td></tr><tr ><td style="color: #161120;text-align: center;">4</td><td style="background-color: #C5D9F1;;">jack21@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">jack21@test.net,
jack22@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">Email</td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #C5D9F1;;">jack22@test.net</td><td style="background-color: #F2F2F2;;">jack1@test.net</td></tr><tr ><td style="color: #161120;text-align: center;">5</td><td style="background-color: #C5D9F1;;">jack39@test.net,
jack35@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">jack39@test.net,
jack35@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">Paper</td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #F2F2F2;;">jack2@test.net</td></tr><tr ><td style="color: #161120;text-align: center;">6</td><td style="background-color: #C5D9F1;;">jack3@test.net,
jack1@test.net,
jack13@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">jack3@test.net,
jack1@test.net,
jack13@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">Email</td><td style="background-color: #C5D9F1;;">jack1@test.net</td><td style="background-color: #C5D9F1;;">jack1@test.net</td><td style="background-color: #F2F2F2;;">jack3@test.net</td></tr><tr ><td style="color: #161120;text-align: center;">7</td><td style="background-color: #C5D9F1;;">nitl34@gmt.com</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">nitl34@gmt.com</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">Paper</td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #F2F2F2;;">jack22@test.net</td></tr><tr ><td style="color: #161120;text-align: center;">8</td><td style="background-color: #C5D9F1;;">jack2@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">jack52@test.net</td><td style="text-align: right;;"></td><td style="background-color: #C5D9F1;;">Email</td><td style="background-color: #C5D9F1;;">jack2@test.net</td><td style="background-color: #C5D9F1;;"></td><td style="background-color: #F2F2F2;;">jack@test.net</td></tr><tr ><td style="color: #161120;text-align: center;">9</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: #161120;text-align: center;">10</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td><td style="text-align: center;;">******</td></tr></tbody></table><p style="width:3.6em;font-weight:bold;margin:0;padding:0.2em 0.6em 0.2em 0.5em;border: 1px solid #A6AAB6;border-top:none;text-align: center;background-color: #E0E0F0;color: #161120">Sheet2</p><br /><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Worksheet Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">AB3</th><td style="text-align:left">=IF(<font color="Blue">SUMPRODUCT(<font color="Red">ISNUMBER(<font color="Green">SEARCH(<font color="Purple">arrEmail,S3</font>)</font>)+ISNUMBER(<font color="Green">SEARCH(<font color="Purple">arrEmail,Z3</font>)</font>)</font>),"Email","Paper"</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">AE3</th><td style="text-align:left">=Sheet1!A3</td></tr></tbody></table></td></tr></table><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Array Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">AC3</th><td style="text-align:left">{=IFERROR(<font color="Blue">INDEX(<font color="Red">arrEmail,MATCH(<font color="Green">0,--ISERR(<font color="Purple">SEARCH(<font color="Teal">arrEmail,S3</font>)</font>),0</font>)</font>),""</font>)}</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">AD3</th><td style="text-align:left">{=IFERROR(<font color="Blue">INDEX(<font color="Red">arrEmail,MATCH(<font color="Green">0,--ISERR(<font color="Purple">SEARCH(<font color="Teal">arrEmail,Z3</font>)</font>),0</font>)</font>),""</font>)}</td></tr></tbody></table><b>Entered with Ctrl+Shift+Enter.</b> If entered correctly, Excel will surround with curly braces {}.
<b>Note: Do not try and enter the {} manually yourself</b></td></tr></table><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Workbook Defined Names</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Name</th><th style="text-align:left">Refers To</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">arrEmail</th><td style="text-align:left">=Sheet1!$A$3:$A$8</td></tr></tbody></table></td></tr></table><br />
Markmzz